


Convergent evolution – a kind of evolution wherein organisms evolve structures that have similar (analogous) structures or functions in spite of their evolutionary ancestors being very dissimilar or unrelated

Evolution of Pokémon Types
Every Pokémon species and every Pokémon move has a 'type' or element associated with it; there are 17 distinguishable elements. There are a mixture of evolutionary histories behind each type and varying routes towards the evolution of a particular type. Grass Pokémon for instance are an example of convergent evolution with the plant kingdom, in which many Pokémon species have developed the cellular components necessary for photosynthesis. Other types may have come about as adaptations to harsh but consistent environments, such as Ice, Fire or Ground Pokémon. Types such as Fighting and Dark may have evolved through sexual selection pressures such as mate competition or conspecific hierarchies. Normal, Bug, and Flying typed Pokémon are not elements as such, but rather their type is defined by their physical nature, for example, the possession of wings for a Flying-typed Pokémon. Pokémon may be single or dual typed; Pokémon with two types may have originally had a primary type, and over evolutionary time may have developed a second type via inter-type breeding or environmental pressures. This theory, in conjunction with the 'ontogeny' theory can be observed with the earlier forms of an evolutionary family having a single element, and the more advanced/derived ancestors having a secondary type, presumably imposed by a more recent selection pressure.
Pokémon Moves and Type Combinations
Pokémon moves are generally categorised as either physical, ‘special’ or less frequently as ‘status’. Physical moves are those that involve the physical contact of the attacking Pokémon’s body against the foe; special moves are those that injure the foe without direct contact, e.g. a jet of water. Status moves are the least common – these are moves that affect the battle, primarily in a strategic manner with no direct harmful effects on the opposing Pokémon. Although status moves are the least common type of technique, they produce an extremely diverse set of effects. Some status moves can induce super speed, paralyse the foe, produce mass illusory copies of an individual, and even increase the intensity of incident sunlight. Due to the extreme use of energy and other bodily resources required to perform moves, Pokémon only have a limited number of times they can use each move. Intuitively, the more resources required for a technique, the fewer times it can be used; Hydro Pump is an example of a resource draining Water-type move, enormous volumes of water are blasted at the foe, this technique can be used very few times before replenishment is required.
Unlike Pokémon species that may be single or dual-typed, moves performed by Pokémon are restricted to a single element. The outcome of a move-opponent interaction is dependent on the type(s) of the targeted Pokémon and their vulnerability or resistance towards the attacking move.
Particular element-bound moves may have either:
- A small and ineffective effect (termed ‘not very effective’)
- A damaging (standard) effect
- A specifically powerful effect (termed ‘super effective’)
- No effect on an opponent Pokémon at all (termed ‘no effect’)
An obvious example is a Water move directed at a Fire-typed Pokémon; water will starve the Fire Pokémon of the oxygen necessary to perform, thus this move choice would be classed as specifically powerful or 'super effective'. Intuitively, a Fire-typed move directed back towards a Water Pokémon will produce a smaller amount of damage (NB. although this particular 'super effective/not very effective' relationship can be reversed, many type interactions are not reversible). A Ground-typed attack directed at a Flying Pokémon (regardless of the secondary type of the Flying Pokémon) will not reach the opponent, as it is air-borne, thus it will have no effect whatsoever. The final type of interaction is a standard attack in which the defending Pokémon is neither vulnerable, nor impervious to the move, and a standard amount of damage is dealt, e.g. a Ground Pokémon attacked by a Fire move. The vulnerabilities of a dual typed Pokémon are dictated by the 'average' effect of their two types. Water is 'not very effective’ against the Grass type, however Water is ‘super effective’ against the Ground type; if a water attack was directed towards a dual Grass/Ground-typed Pokémon, the net result would be a standard attack - due to a cancellation of the two extreme effects. Pokémon species with a single type have the advantage of a reduced number of vulnerabilities; conversely, dual-typed Pokémon species have more vulnerabilities, but also more resistances.
Although many moves have defined titles or names, Pokémon are capable of producing attacks that do not fall under a specific name. The development of a ‘title’ for each move is thought to have classically developed between the Pokémon and it’s trainer as a short hand for efficient battling; in the past, terms varied depending on region, trainer and Pokémon species. Linguistic evolution led to these short hand terms (used to define every technique each species can perform) eventually becoming standard nomenclature, used relatively uniformly between all regions. Pokémon can recognise any order given by the trainer to perform a particular technique, as long as they know, or are capable, of performing the move.
The outcome of Pokémon/move type match ups (such as a super-effective interaction), may be due to inherent chemical interactions, i.e. Water vs. Fire; the outcome of other type match ups may have arisen from co-evolved relationships, like Fighting vs. Normal Pokémon. Although the outcome of type match up relationships has evolved between Pokémon species of different types, individual moves exhibit the same outcomes, independent of the species or type of the Pokémon using the move. For example, a Water-typed move will remain ‘super effective’ against a Fire Pokémon, whether it is performed by a Water-typed Pokémon or otherwise, this is due to the inherent advantage of Water over Fire, not because of the Water-typed Pokémon using the move (see, ‘STAB’ below). This phenomenon is an outcome of the evolutionary history of different species and the moves they have developed to survive and outcompete other species. Different groups of Pokémon species developed each of their types, and their characteristic moves, due to interactions with the environment and other species. Every move of each Pokémon type evolved through slight mutations in the genomes of individuals. Over time these slight beneficial mutations accumulate and spread throughout the population. These beneficial genes are then passed down to descendants, however can also be passed across to other species, via bacterial and viral vectors (horizontal evolution). In this way, adaptations that resulted in the evolution of particular types or moves are still effective, and largely have the same impact regardless of the Pokémon bearing the genetic information (Figure 1 to be inserted). This holds true with the exception of the same-type attack bonus.
STAB (Same-Type Attack Bonus)
Pokémon, like animals, are optimized to perform best in the environmental conditions that influenced their evolution. Similarly, moves of a given type/element performed by Pokémon of the same type are especially powerful, e.g. a Bug-typed Pokémon performing a Bug-typed move such as Bug Buzz (Figure 2), this is known as the 'same-type attack bonus' (STAB). Trainers often focus their Pokémon team towards learning moves whose type corresponds with that of the individual species. It is often advantageous for wild Pokémon, or those in a team, to know non-STAB moves and bewilder the foe with a variety of unexpected techniques.
Normal
Normal-typed Pokémon generally have a similar appearance to many members of the animal kingdom. This group is thought to represent the ancestral state of most species; Fire, Water, and all other types of species likely evolved from ancestors whose abilities and physiology resembled those of modern day Normal-typed Pokémon. Normal Pokémon (as with all types) are able to breed with different typed Pokémon from the same egg group; over evolutionary time these hybridisations resulted in Normal-typed species possessing moves of many other types of Pokémon. Many Normal Pokémon migrate around Unova at various points in their lifecycle; juveniles tend to develop around the south-eastern areas of Unova. As these immature populations battle, develop and grow they move 'clockwise' around the region and settle into ecosystems of Pokémon with similar experience levels. Pokémon of other types also undergo similar migratory patterns to maintain optimum competition for experience and mates; the nature of these migrations is analogous to a tournament, in which weaker Pokémon remain and victors proceed.
Normal-typed moves exhibit both the largest repertoire and the largest diversity of effects. Supporting the 'Normal-typed ancestor' hypothesis, Normal-typed moves are often the first moves learnt by larvae from any species. Many Normal techniques are basic, default moves and do not require any specialisation (such as photosynthetic cells etc.) however some are powerful, very specific moves (Figure 3 to be inserted). Some Normal-typed clades may represent evolutionary transitions towards a completely new ‘type’, for instance, a number of independent Pokémon families harness sound for various offensive and defensive techniques (Figure 3 to be inserted). Although these groups represent the evolution of an entirely new type; in some species, the later stages of an evolutionary family may possess adaptations, reminiscent of other types. Later stages of the dinosaur-like treecko family (purely Grass-typed Pokémon) are behaviourally predisposed to gliding between trees and possess adaptations to do so, however are not part Flying-type; Pokémon groups like these allow scientists to study the pressures necessary in the evolution of particular types.
Similar to Normal-typed moves, Normal-typed Pokémon are a melting pot, in which moves or Pokémon with no obvious type affiliation are labelled. Normal-typed Pokémon are the only species that have no specific advantages against any other type. Due to the often physical nature of Normal-typed moves, they are unable to affect Ghost-typed Pokémon. Conversely, Ghost-typed moves are also unable to affect Normal Pokémon. Almost all Normal Pokémon that have a secondary type are partially Flying (Figure 4). On average Normal-typed Pokémon have greater endurances and a high-tolerance for prolonged battling.
Advantages
Super effective - none
Resistances - none
Immunity - Ghost
Fire
To maintain heat, the cells of endothermic organisms such as mammals and birds produce energy, in the form of heat, as a by-product of normal metabolic activity; the metabolic rate of Fire Pokémon is far higher than that of any animal species. The body temperature, Tb, of Fire-typed Pokémon is extremely high and must be maintained for survival. Many Fire-typed Pokémon have evolved around extremely hot environments such as deserts and volcanic regions. These extreme environmental temperatures maintain the internal body temperatures of Fire Pokémon, therefore energy needn't be expended maintaining the Tb of individuals in these environments. When exposed to a temperate environment with a much lower ambient temperature than the Tb of Fire types, Pokémon must maintain their high body temperature by consuming large amounts of food. Due to their endothermic nature, the consumption of food liberates extreme amounts of heat internally, and consequently, externally to the environment.
Some Pokémon have exocrine glands that excrete various hormones and gaseous pheromones, these flammable vapours are visible on some species of Fire Pokémon with seemingly perpetual flames emitting from their surface. Although not completely understood, particular Fire species have an internal flame that uses food and other products as energy to produce external flames. This engine-like digestive system must have an extremely stable insulating material, similar to the mucosal lining of the hydrochloric acid filled mammalian stomach. Fire Pokémon often discharge scorching flames towards opponents (special moves), or engulf body parts in flame then launch physical attacks - foes may be left burnt after an attack by a Fire Pokémon (Figure 5 to be inserted). On average, Fire-typed Pokémon have powerful special attacks. Fire moves are especially damaging towards Grass and Bug Pokémon, which are vulnerable to heat and flammability. Steel and Ice-typed Pokémon can melt or become disfigured when they defend against Fire moves.
Advantages
Super effective - Grass, Steel, Ice & Bug
Resistances - Fire, Grass, Steel, Ice & Bug
Immunity - none
Water
Water Pokémon have numerous adaptations for life in aquatic environments and for the efficient manipulation of water. The respiratory system of Water Pokémon is refined to taking in large amounts of atmospheric oxygen and releasing large amounts of excretory products, i.e. carbon dioxide (CO2) and water (H2O). Water Pokémon are also able to condense and store large amounts of atmospheric water vapour during inhalation; the cellular water content (although high in other organisms) is higher in water Pokémon. Thus, similar to camels of the animal kingdom, Water Pokémon can store excess water in their dilute somatic and blood cells, bringing it out of solution when necessary. Water Pokémon may be confined strictly to the water, not at all, or an amphibious in-between. Exclusively water dwelling Pokémon are not able to battle on land, however terrestrial Water Pokémon may battle in either. Most Water Pokémon are blue in colouration; their blue colour is due to both a high cellular concentration of water reflecting the sky, and in some cases, blue melanocytes in their skin that aid in aquatic camouflage (Figure 6).
Most attacks performed by Water Pokémon are powerful deliveries of highly compressed water (pumps, waves etc.), used offensively towards opponents and are therefore classed as 'special' attacks. The often high pressure, deluge delivery associated with Water-typed moves causes these techniques to be super effective in their effects against Fire, Ground and Rock Pokémon. These attacks are capable of penetrating and rendering the bodies of Ground and Rock-typed Pokémon less efficient. Water attacks effectively lower the internal body temperature of Fire-typed Pokémon and starve the commonly flaming body of Fire Pokémon of oxygen. Water Pokémon are the most speciose of all types of Pokémon, often inhabiting extreme environments such as within deep oceanic trenches. Water moves also integrate the expansive release of CO2 by creating jets of bubbles within the water they exhale (Figure 7 to be inserted). Scientists have hypothesised that water Pokémon can expel their excess carbon dioxide to precipitate atmospheric water, create clouds and produce rain.
Advantages
Super effective - Fire, Ground & Rock
Resistances - Fire, Ice, Steel & Water
Immunity - none
Electric
The generation of electricity is thought to have initially evolved for use in locating prey, similar to echolocation, and for communicating with conspecifics. Nerve cells and muscle cells, such as those in the heart, naturally generate electrical impulses. Electrocytes (cells specialised to electricity generation) are derived from muscle cells (myocytes) in some species, or modified nerve cells in others. A nervous centre controls the simultaneous firing of the electrocytes of Electric Pokémon; this can be stimulated consciously, and at the request of the trainer. Electrical discharges generated by fauna are species-specific, i.e. each species has a distinctly different electrical current. This fact lends credence to the notion of electric generation evolving for the purpose of species specific communication.
Electric Pokémon, like Fire Pokémon, have an extremely high metabolic rate, that is – the rate at which they generate heat from food. Organisms with a high metabolic rate require large amounts of food to facilitate their energy requirements. On average, Electric Pokémon have a higher speed and special attack statistic owing to their highly specialised electricity-generating muscles. Many powerful Electric species generate positively charged leader channels high into the atmosphere leading to frequent lightning incidences. Such species have evolved mechanisms to withstand and store atmospheric lightning strikes. Lightning and other electrical phenomena are often utilised by these Pokémon offensively to shock and fry opposing Pokémon (Figure 8 to be inserted). Flying and Water-typed Pokémon are especially vulnerable to Electric moves due to either no-ground contact, and the high conductivity of water respectively.
Advantages
Super effective - Water & Flying
Resistances - Electric, Flying & Steel
Immunity - none
Grass
Grass Pokémon vary widely in their association with plants. Some Grass Pokémon form mutualistic symbioses with plants, in which the plant provides the Pokémon with sugars and energy, and in return the Pokémon aids the plant in pollen and seed dispersal. Many grass Pokémon have photosynthetic cells containing chlorophyll that generate energy for the Pokémon, these may be concentrated in specialized organs on the Pokémon such as leaves or vines (Figure 9). Grass moves often utilise Sun light to generate energy, or use various plant components to attack the opponent. Some Pokémon have developed cellulose and other components that give their cell walls rigidity, similar to members of the plant kingdom. Members of the grass family, Poaceae (Kingdom: Plantae) are extremely efficient at carbon dioxide intake via their stomatal pores (openings on the underside of leaves involved in photosynthesis). Many of the later stages of evolutionary families possess this form of photosynthesis, known as the C4 pathway. Basic (larval form) Grass-typed Pokémon, often have less-efficient biochemical pathways for fixing carbon such as the C3 pathway.
Physical Grass-typed attacks involve the projectile/melee use of seeds, branches, thorns, vines, and leaves which are especially destructive considering the tough cellular structure of Grass Pokémon (Figure 10 to be inserted). Special attacks may involve energy transfer between the immediate environment, the opponent and the user, often by leeching nutrients from foes. Fine excretions such as pollen and spores (fungi related) are also used to affect status and absorb energy, even inducing slowed movement, sleep and paralysis instantly in foes. The Sun is fundamental for Grass Pokémon; many moves use the Sun’s energy to regenerate or to concentrate and use the waves offensively; some species are even capable of intensifying radiating sunlight to improve their performance. Unlike organisms of the fungi kingdom, which are more closely related to animals than plants, Pokémon that resemble, or bear fungi are capable of photosynthesis and other plant-related attacks.
It is theorised that in prehistoric times, many Grass Pokémon were initially herbivorous Pokémon (likely Normal and Bug-typed) that consumed large amounts of plant-products. The composition of Grass Pokémon cells suggests that at a number of points in the past, genetic material from plants or algae may have become integrated with that of the herbivorous Pokémon. Over evolutionary time many species have mutated different plant organs or at least developed different associations with plants. The energetic and fitness benefits of these associations were likely immense and caused a radiation (in evolutionary terms) of these groups of Pokémon leading to rich diversity of current Grass species. This theory is tentatively supported by the large amounts of Pokémon species that are Bug-typed herbivores and the animal, Elysia sp. (Class: Gastropoda) that possesses algae genes capable of maintaining functional chloroplasts. Alike Grass-typed Pokémon, organisms of the plant kingdom have a rich evolutionary history with ground, rock and water. The evolutionary history of plants has sculpted their physiology towards breaking down rocky substrates thus generating fertile soils capable of root and subsequent water penetration. Structures and physiological adaptations enabling these processes are present in Grass-typed Pokémon. The roots and appendages of Grass Pokémon are specialised to constricting and destructing Ground and Rock tissue and are highly effective at using Water Pokémon as a growth substrate.
Advantages
Super effective - Ground, Rock & Water
Resistances - Electricity, Grass, Ground & Water
Immunity - none
Psychic
Psychic Pokémon are able to intercept and interpret the electric signals utilised by neurons (brain cells) to communicate with other parts of the body (including the brain) that bring about movement and 'consciousness'. This relationship is analogous to the electricity liberated by fish and detected by electric receptors on nearby sharks. This electrical firing within the brain may generate perceptible brain waves - this neuronal energy can be manipulated in a variety of forms (Figure 11 to be inserted). The production of electricity generates magnetic fields – psychic Pokémon utilise this phenomenon to levitate Pokémon or other objects by repelling against the fields generated by Earth. As well as intercepting neuronal firing, psychic Pokémon can also stimulate the involuntary firing of neurons, projecting thoughts and other imagery into the minds of others, a psychic Pokémon may send an individual into powerful long lasting delusions. Neuronal firing can occur en masse, undulating in waves of intensity; the brains of Psychic Pokémon almost always modulate between intense gamma wave concentration and the hypnotised-like state of alpha wave activity.
A large proportion of human decision making occurs unconsciously several seconds before the manifestation of conscious thought. Electrical activity in the frontopolar cortex of both Pokémon and human brains can be intercepted by Psychic-typed Pokémon allowing them to consciously pre-empt decisions before they are made. Psychic Pokémon can read brain activity so fluently it can give the outward appearance that these Pokémon can travel through time to apprehend the actions of their opponents. Psychic-typed Pokémon are unable to accurately read the neuronal firing of Bug and Ghost-typed Pokémon due to the diffuse central nervous system of these species.
Mutations in the base sequence of the ASP encoding gene of many psychic Pokémon is hypothesised to be the mechanism behind the extremely high density of neurons in the brain of these Pokémon. The fitness benefits of this mutation are likely dramatic as many species bear a costly brain to body ratio. As such, psychic Pokémon are viewed as being an especially intelligent type of Pokémon. The cerebral discharge of psychic Pokémon can be concentrated to produce a manifested pulse of energy, this is often used in an offensive manner. Psychic attacks can commonly leave the foe in a severe state of confusion, potentially resulting in self-inflicted harm. Powerful psychic Pokémon are able to alter a foe's perception of reality and create powerful imagery and altered states, the process by which some psychic Pokémon teleport is currently under experimental investigation. Psychic Pokémon rely primarily on their central nervous system to perform daily activities, they therefore require large amounts of glucose to fuel their mental expenditure. Many non-offensive Psychic moves stimulate the production of different hormones that increase the individual’s status, including defence (both special and physical) and attack (special and physical). Psychic Pokémon have evolved especially powerful special attacks and special defences, these facets are often the focus of modifying moves. Most Psychic attacks involve discharges of mental energy; these often strike the opponent and cause aberrant stimulation to a foe's nervous system. Psychic waves often result in alterations to the nerves themselves even inducing changes in the threshold potentials required to perpetuate neuronal firing. Some Pokémon species demonstrate radical physiological reactions when attacked by Psychic energy. It is theorised that the neurons of Poison Pokémon that have evolved adaptations to avoid self-intoxication are disrupted by this intense mental energy, the Pokémon are thus rendered vulnerable to the effects of their own toxins. Similarly, the dense concentration of muscle fibres and electrical firing of a Fighting Pokémon nervous system are especially susceptible to the harmful nerve impulses elicited by Psychic attacks.
Advantages
Super effective - Fighting & Poison
Resistances - Fighting & Psychic
Immunity - none
Fighting
Fighting Pokémon are generally perceived as vigilant, discerning Pokémon capable of efficient and well executed strikes towards opponents. The vast majority of moves performed by Fighting Pokémon are physical - using limbs of the body to strike the foe. There are still many moves dedicated to meditation, and honing/refining future combat. Most Fighting Pokémon are single typed, solely dedicated to the Fighting element. A few Fighting Pokémon have refined moves to project 'energy' as well as physically attacking, the mechanism by which these Pokémon produce this energy is not completely understood. The unchallenged hypothesis suggests that rapid projections of fists etc. generate a sonic boom as the layers of air in front of the fist fail to escape, thus resulting in explosive projections towards the foe (Figure 12 to be inserted).
It is thought that Fighting Pokémon are derived or ‘advanced’ Normal-typed Pokémon that have distinguished themselves through outperforming competitors for mates and resources and thus have refined fighting as a form of display of strength and integrity. In battle, Fighting Pokémon are evolutionarily engineered to out compete their ‘primitive’, Normal-typed equivalents. During training and display, Fighting Pokémon hone their mind and body by striking immensely solid structures - in battle, foes of a similar structural makeup are extremely susceptible to specifically refined Fighting attacks. On average, the physical attack of Fighting-typed Pokémon is more pronounced than the other stats that define the species. Many Fighting Pokémon have mutations in the SCN9A region of their genome, some humans with mutations in this gene are capable of detecting physical sensations but may be incapable of generating a negatively associated pain response. This, generally maladaptive or disadvantageous mutation, has been positively selected for, likely by observing females as an apparent display of strength of character. Examples of susceptible foes to Fighting Pokémon include Ice, Rock and Steel Pokémon. There are two governing theories as to the success of Fighting-typed moves over Dark Pokémon, potentially the immense psychological focus exhibited during training aids in the pre-emption and counter of Dark-typed Pokémon. Alternatively, it has been demonstrated that in ‘no visible light’ trials, Fighting Pokémon remain accurate in their strikes, indicating a potential physiological adaptation that allows them to maintain accuracy when blind – Fighting Pokémon may therefore have the potential to perceive infra-red emissions with their striking limb, analogous to the organs of some snakes. The latter hypothesis is gaining credence as non-Fighting Pokémon that have gained the genes for Fighting-typed moves (through a Fighting ancestor) are also capable of accurately striking foes in ‘no visible light’ trials.
Advantages
Super effective - Normal, Rock, Steel, Ice & Dark
Resistances - Bug, Dark & Rock
Immunity - none
Poison
‘Poisonous’ chemicals produced by biological entities such as animals are known as toxins or venoms as opposed to poisons, therefore the term Poison to describe toxic Pokémon is generally a misnomer. Poison-typed Pokémon as a group have a diverse evolutionary history and no one single ancestor, that is to say poison Pokémon are not necessarily related purely for the fact they produce toxins. Venomous Pokémon are those that deliver toxins generally by bite or sting (cardio toxins etc.), other toxic Pokémon produce mycotoxins (toxins produced by fungi that may attack the foe's nervous system) or abiotic poisons such as nitrogen dioxide (NO2) and hydrogen sulphide (H2S) (Figure 13 to be inserted). There are roughly equivalent numbers of physical and special Fighting-typed moves, toxins are often excreted through a variety of available orifices, whereas physical moves utilise e.g. envenomed limbs, to inject venom. The bodies of Poison-typed Pokémon are often perforated with many pores and openings that allow the continuous outflow of toxic products from the body. Toxic and poisonous attacks are primarily liquids and gases that have a likely chance of ‘poisoning’ the foe - this is a status ailment in which the opponent gradually loses health during the match, becoming ‘badly poisoned’ is a more acute status in which the damage accumulates exponentially.
Poison-typed Pokémon are often partially Grass or Bug-types, this is a relatively accurate reflection of the animal, plant and fungi kingdoms. The toxins and poisons utilised by Poison-typed Pokémon have a diversity of evolutionary origins. Some may have evolved through the mutation of a biological molecule with a prior purpose such as saliva for digestion, or possibly, in a scenario akin to steel Pokémon they may have become ‘immune’ to abiotic poisons and have thus incorporated them into their physiology. All Poison-typed Pokémon have adaptations in their body that disenable them from easily poisoning themselves, comparable to the Pufferfish, (Family: Tetraodontidae) which has neuronal adaptations that disenable self-toxicity from its own lethal tetrodotoxins. Toxins that super effectively damage Grass-type Pokémon vary in their offensive mechanism, some cause damage via direct contact with plant tissue, these may be acidic and degrade the plant cell walls. Alternative methods of toxin distribution may be through the air in the form of gaseous particles that may be taken up by the Grass Pokémon, thus damaging the individual gradually over time. All forms of toxin uptake may result in the poisoned status ailment.
Advantages
Super effective - Grass
Resistances - Bug, Fighting, Poison & Grass
Immunity - none
Ground
Ground Pokémon (Figure 14) are adept at travelling above and below the surface of the earth and are capable of powerfully manipulating the Earth’s crust. The body of some Ground Pokémon is composed of compressed sediment such as soil and sand however most are just restricted to a subterranean habit. The modified physiology of Ground-Pokémon that gives them proficiency at subterranean travel has the disadvantage of minimising their capacity to jump or perform aerial attacks. Developing the morphology for below-ground travel has allowed ground Pokémon to powerfully command various earthy substrates for use as offensive tools. They are capable of producing fissures (chasms) in the crust, small scale earthquakes, uplifting top soil to produce sandstorms and consuming and powerfully expelling the ground offensively. Ground Pokémon are especially powerful physical attackers whose moves often result in the reduction of accuracy or another attribute such as speed. The forceful blasts of earth from Ground-typed moves are particularly damaging to Poisonous species that have inherently more vulnerable physiologies to the absorptive and obstructive properties of soil. Due to the grounded nature of this type of Pokémon, any form of electric attack is neutralised by Ground-typed Pokémon as it is diffused through the Pokémon’s feet and consequently through the Earth, effectively neutralising the electrical energy. Accordingly, ground typed moves strongly injure Electric Pokémon by neutralising their internal circuitry. A similar natured neutralisation occurs when Ground Pokémon starve Fire-types of oxygen and absorb the opponent’s bodily heat with their offensive ground attacks. During the evolutionary development of Ground Pokémon, there was a selection pressure to develop a number of modifications to penetrate the subterranean environment. These unique adaptations include travelling through various densities of substrate including rock and mineral deposits (ores). Ground typed moves are therefore particularly effective at breaching Rock and Steel-typed defences.
Exocrine gland – an externally secreting gland, such as a salivary gland or sweat gland that releases its secretions directly or through a duct
Sexual selection - sexual selection is a type of natural selection that affects the traits that influence an individual's ability to attain or choose a mate, instead of the traits that influence an individual's ability to survive. Sexual selection is thought to be responsible for the evolution of many elaborate morphological features, such as long plumes in birds, courtship displays, and bright colours

Pokémon Types
Figure 2: Fighting Pokémon Sawk, Caerulbellator karatensis, launching a misaimed physical strike at the Bug Pokémon Accelgor (Molluscus tachytacitus). Whilst dodging, M. tachytacitus exhibits a special STAB (same-type attack bonus) technique, Bug Buzz, to damage and potentially bewilder the opponent
Melanocyte – a pigment bearing cell

Threshold potentials – the action potential threshold in a neuron is the point of depolarization at which the neuron fires, transmitting information to another neuron
Figure 4: Museum display of extant avianoid, Doduo skeleton (Polycephala tachyapteryx); a Normal/Flying, dual typed species
Fitness – describes the ability to both survive and reproduce, and is equal to the average contribution to the gene pool of the next generation that is made by an average individual of the specified genotype or phenotype
Habit – characteristic appearance, form, or manner of growth, especially of a plant or crystal
Exapted - the utilization of a structure or feature for a function other than that for which it was developed through natural selection
Acute – having a rapid onset and following a short but severe course
Advantages
Super effective - Poison, Electric, Fire, Rock & Steel
Resistances - Poison & Rock
Immunity - Electric
Flying
The possession of wings or the ability to fly is essentially sufficient to class a Pokémon with the Flying-type. All Flying Pokémon (with one exception) are dual typed, 'Flying' is always the secondary type associated with these Pokémon. The evolutionary path leading towards flight, as with animals is most likely due to niche opportunities for food. Physical attacks from Flying Pokémon normally utilise the high speeds accrued during flight to bombard the opponent with beaks, wings etc. Non-physical Flying moves generally manipulate the atmosphere and create hazardous winds aimed at the foe, gusts, and whirlwinds etc. The ability to fly is not a necessity to being Flying-typed, many Flying-typed Pokémon can manipulate air to their advantage. Such species can heat or cool discrete volumes of air to generate intense vortices of air currents. Instantaneous tornadoes can be launched towards foes, pulling up vegetation in their path. Flying Pokémon are adept at producing sonic booms and producing vacuums with high-speed flight. An individual will lunge through the atmosphere, causing tunnels of trailing air to implode on the foes. Erratic and chaotic movements of Flying Pokémon defy the predicting capabilities of many Pokémon types (Figure 15 to be inserted). Both the destructive use of air and speedy physical attacks utilised by Flying-typed Pokémon offensively complement the defensive vulnerability of Flying and Bug-typed Pokémon. The agility of these species is often their advantage and enables them to completely evade all Ground-based attacks.
Advantages
Super effective: Bug, Fighting & Grass
Resistances: Bug, Fighting & Grass
Immunity: Ground
Dragon
Dragon Pokémon represent an ancient, relatively unchanged lineage of Pokémon (Figure 16 to be inserted), i.e. their current life cycle, including various evolutionary stages are extremely similar in their morphology to their ancient ancestors. Through analyses of the fossil record Dragon Pokémon appear to have been one of the dominant life forms during the Mesozoic period of Earth’s history, after which, their fossil record is essentially bare. The reappearance of Dragon-typed Pokémon extraordinarily recently (approximately 15,000 years ago) influenced the culture of ancient peoples, thus forming an intimate bond with their descendent, contemporary cultures. Dragon typed Pokémon are often highly intelligent and powerful species, and form the second-rarest Pokémon type. Dragon-typed Pokémon are often dual-typed with a wide range of other elements. Many Dragon moves are aggressive, offensive attacks that involve brute strength and rage directed at the opponent, often invoking seemingly mystical powers that are not yet understood by researchers. The skin of Dragon-typed Pokémon is commonly extremely thick and provides substantial defence.
The widely accepted theory accounting for the ~65 million year disappearance of Dragon typed Pokémon places the cause on the Cretaceous/Tertiary (K-T extinction) mass extinction event. During the K-T extinction the numbers of Dragon Pokémon were severely diminished, forcing the remaining species into a global, subterranean retreat. Numerous hypothetical locations have been proposed for the Dragon shelter, yet none have been competently verified. It has further been theorised that during this period, Dragon Pokémon were forced into intense competition and battle with one another. The Cainozoic-long struggle forced Dragon Pokémon to become highly adapted to inter-Dragon battling yet provided them with no adaptations to specifically combat any other type of Pokémon. The outcome of this theoretical scenario has resulted in the especially good physical attack of most Dragon species. Another postulation of the hibernation theory suggests that the Dragons’ place of refuge was not exposed to the extreme fluctuations in the Earth’s climate during this time. A potential evidence for this speculation lies in the inability of Dragon-typed Pokémon to regulate their body temperature in the cold, as they have had no exposure therefore no chance to adapt during periods of global cooling.
Advantages
Super effective - Dragon
Resistances - Fire, Grass, Water & Electric
Immunity - none
Bug
Bug Pokémon are most similar to what are known as the arthropods of the animal kingdom; this group includes insects, arachnids, crustaceans and myriapods (centipedes and millipedes). Bug Pokémon generally have armour-like exteriors, often utilising this exoskeleton by physically attacking opponents with their mandibles, modified limbs etc. This group of Pokémon often have modified appendages and organs that discharge various compounds such as acids, silk and other excretions (Figure 17 to be inserted). Bug Pokémon have many offensive techniques that may also be used in mating rituals. Many species are capable of producing electromagnetic transmissions that can confuse or blast the foe; these moves may be used in a mild form to attract mates.
Bug-typed Pokémon often evolve extremely quickly and may even reach their fully evolved stage before many other types of species reach their second evolutionary stage. In order to facilitate such rapid metamorphosis, these Pokémon must eat for extensive periods during the early stages of their life-cycle. The extremely robust exoskeleton of Bug-typed Pokémon must be shed to allow the Pokémon to grow. Between moulting cycles individuals apply various excretions to their cuticle, enhancing evasiveness and strengthening their exoskeleton. Bug species are commonly dual-typed with the Poison and Flying-type.
Bug-typed moves are super effective against Grass-typed Pokémon; Bug species have had to evolve specialised adaptations to consume plant material, as this is their primary food source. The physical slashing of Bug appendages and mandibles likely evolved to break down plants for optimum food intake. These techniques were likely then exapted for use against Grass-typed foes, providing a far greater energy source than a purely plant-based diet. The ecological separation of Dark and Psychic-typed Pokémon may mean that these species were never exposed to Bug-typed techniques. The isolation of Dark and Psychic species from Bug Pokémon may have denied natural selection the opportunity to develop any form of adaptation or defence towards Bugs.
Advantages
Super effective - Grass, Dark & Psychic
Resistances - Fighting, Grass & Ground
Immunity - none
Rock
Rock Pokémon are highly defensive organisms that are either composed of inorganic minerals or have an organic hide that is comparable to rock. Different species of Rock-typed Pokémon have unique mechanisms by which their inorganic structures develop. The crystalline structure of some species is characteristic of minerals that form over vast periods of time. Whereas other structures have the makeup of extrusive rock that has cooled quickly and not initiated crystal formation. All but two of the Rock-typed attacks are classed as physical; generally utilising the Pokémon’s body as a weapon or generating projectile rock products. The rocky body of some Pokémon species is generated by sedimentary processes, like the body of Rock/Ground-typed Pokémon that have consecutive layers of earth compressed and added to the body to generate mudstone armour (Figure 18). Some rock attacks utilise various physical properties of the Pokémon’s rocky body. Some species use their body to focus light waves through successive compounding crystalline structures to generate offensive electromagnetic techniques. Rock Pokémon generally have extremely good defence owing to their thick hide, and relatively good physical attack. To date, the preserved genetic material of 17 different species of extinct Pokémon has been discovered with flawless quality such that each species has been cloned and reintroduced into their former biomes. All 17 resurrection experiments became contaminated with the rock-eating bacteria responsible for transmitting Rock-typed moves between various species. Bacterial plasmids present in the initial cell cultures, used to resurrect the extinct Pokémon, got integrated into the embryonic tissue of each sample. These contaminations led to all 17 resurrected species becoming at least part Rock-type, or at least in part, although some of these Pokémon were likely to have been Rock-typed in the past. Rock-typed attacks are super effective against intuitively vulnerable species including fast but commonly fragile Flying species as well as Bug, Ice and Fire-typed Pokémon.
Advantages
Super effective - Flying, Bug, Fire & Ice
Resistances - Normal, Fire, Flying & Poison
Immunity - none
Ghost
Ghost Pokémon are largely a group of organisms, largely parasitic, that leech sugars, phosphates, amino acids and other compounds necessary for sustaining life. They use these nutrients to facilitate their own growth and reproduction at the expense of other Pokémon. Generally Ghosts absorb these resources from dying organisms, however powerful individuals may attack and actively steal nutrients from healthy hosts. The parasitic and scavenger-like life cycle of Ghost Pokémon allows these organisms to maintain incredibly low metabolic rates and consequently live with extremely long lifespans. This lifestyle offers low levels of available nutrients and has led to minimal speciation with high degrees of specialisation. Some Ghost Pokémon have evolved obligate mutualisms with hosts and use the body of the host organism to collect nutrients and spread the parasite’s (Ghost Pokémon) genes. Some species of Ghost Pokémon have secondarily evolved nutrient-acquiring capabilities and are able to maintain a constant supply of nutrients and therefore do not require a host. The bodies of Ghost Pokémon absorb all but a small range of light and are therefore invisible to the human eye. When necessary, Ghost Pokémon are capable of altering their cellular chemistry and becoming conspicuous; Pokémon with low health, sustenance, or those experiencing stress are commonly unable to turn invisible. When parasitising a host, tendril-like appendages emerge from the Ghost’s body and envelope the host; specialised organelles in the Ghost’s cells absorb the host's ATP and other nutrients, transporting them back to the host’s core (Figure 19 to be inserted). Individuals that do not gather enough energy to sustain active living, degenerate into a dormant state and subsist undetectably. Dormant Ghost Pokémon circulate throughout the environment as part of a ‘pool’ of potential Ghost Pokémon. The Ghost pool concentrates in habitats of high mortality and areas prevalent with weak Pokémon; Ghosts and their largely invisible life cycle are important components of many traditions and folk-lore.
The often-diffuse and invisible bodies of Ghost Pokémon are able to elude the attacks of both Normal and Fighting types; these physical strikes pass straight through the bodies of these Pokémon, giving them complete immunity, lest they be detected. Although Ghost Pokémon are largely invisible to the human eye (as well as many other Pokémon) the eye of Ghost Pokémon has evolved to perceive other Ghost species. Active, materialised Ghosts vigorously seek out and consume dormant Ghosts and have developed many specialisations for acquiring this resource. The extremely active metabolic pathways of the Psychic Pokémon central nervous system are a rich resource for parasitic Ghosts; Ghosts have developed adaptations for quickly, and efficiently leeching the ‘life’ and electrical energy of Psychic species.
Advantages
Super effective - Ghost & Psychic
Resistances - Bug & Poison
Immunity - Normal & Fighting
Ice
Ice Pokémon developed over evolutionary time in icy environments; they have optimized their metabolic performance to sub-zero temperatures. Physiological responses to the cold vary between Pokémon, as does their offensive use of ice. Some Pokémon isolate heat in heavily insulated compartments of their body. These compartments allow Ice species to rapidly absorb heat from the environment, thus cooling the air instantaneously, as 'coldness' is merely a deficit of heat. Solid water (ice) contained in the Pokémon’s body is passed towards the specialized heat absorption compartments to liberate liquid water suitable for consumption or may be used as a projectile which can be secondarily frozen mid-air (Figure 20 to be inserted). The production of large volumes of water suggests that Ice Pokémon may be modified Water Pokémon, with the capacity to secondarily freeze fluids. Ice Pokémon can produce super-cooled water (water below freezing point) which is chemically ‘interrupted’ from forming ice crystals; on impact with the foe, the ions within the water molecules shift, allowing super-cooled ice to harshly damage the opponent. Ice moves generally use ice or snow particles as projectiles or remove environmental heat to cause severe temperature loss in the opponent. Other Ice techniques utilise storms of dense, specially orientated ice crystals that shift visible light into lower and higher frequency infra-red and ultraviolet light to damage the foe.
The extremely low body temperatures of Ice Pokémon allow individuals to rapidly cool their immediate surrounding as well as the bodily water of nearby Pokémon. The expanding water forms ice crystals which are powerful enough to expand and destroy the cellular integrity of Grass-typed Pokémon (Figure 21) and the dense particulate structure of Ground Pokémon. The harsh effects of Ice-typed moves also severely damage Flying Pokémon; the process by which this occurs is not well understood. One hypothesis states that during a battle, the presence of Ice moves, or an Ice-typed Pokémon forms microscopic ice particles in the atmosphere, these damage the Flying-typed opponent as it flies swiftly through the icy shards.
Advantages
Super effective - Dragon, Flying, Grass & Ground
Resistances - Ice
Immunity - none
Steel
Steel Pokémon have chemicals in their cells known as chelating agents; these are particles capable of binding to metal atoms. Chelating agents are molecules that consist of ligands in a complex arrangement, this allows large amounts of metals to be stored in a dissolved form. The steel of these species forms exoskeleton-like armour around specific parts of the Pokémon’s body. Some Pokémon species are capable of dissolving or precipitating the steel out of cellular solution; the steel of these Pokémon is composed of organic carbon with a powerful lattice-like interaction with iron. Many Steel Pokémon most likely evolved in and around areas with high concentrations of haematite in the earth, they are capable of extracting the iron cations (positively charged particles) through their diet, i.e. vegetation and the tissue of Pokémon prey. It is thought that Steel Pokémon were forced into the ecological niche, of mineral consumption, through competition with Ground-typed Pokémon that dominated the subterranean environment. Pokémon that were unable to store or metabolize the metals would have died through metal poisoning, thus over evolutionary time Steel-typed Pokémon represent the refined forms of steel-sequestering lineages. The cells of some Steel Pokémon also contain magnetosomes and other organelles that allow geomagnetic navigation and polar-levitation. Steel Pokémon often consume and concentrate supplementary metals into their body to strengthen the necessary parts of their body.
Steel Pokémon attack by physically slamming opponents with metal appendages or by using special moves, these utilise the properties of their steel bodies to harm opponents. The mechanical-like physiology of some Steel species can be used in conjunction with steam pressure to project strikes towards the foe with unstoppable power, equal to a locomotive.
The bodies of steel Pokémon are outrageously tough and are largely impervious to attacks from 12 of the 17 elemental types (Figure 22 to be inserted). The toxins of Poison-typed Pokémon are unable to affect Steel Pokémon due to two mechanisms. Superficially, the toxins are incapable of entering the blood stream of Steel Pokémon due to their thick, impermeable armour. If venoms or toxins enter the bloodstream of Steel species, factors in the blood of these Pokémon are able to bind and store noxious chemicals within their bones and steel structures. Immunity to Poison-typed moves likely arose from the evolutionary history of these species, and their chronic exposure to toxic resources. The physical characteristics of Steel-typed attacks allow them to drive straight through the normally strong defences of Ice and Rock-typed Pokémon. Special typed attacks that utilise other properties of steel are equally efficient at destroying the defences of Ice and Rock Pokémon.
Advantages
Super effective: Rock & Ice
Resistances: Bug, Dark, Dragon, Flying, Ghost, Grass, Ice, Normal, Psychic, Rock & Steel
Immunity: Poison
Dark
Dark Pokémon are characterised by possessing an affinity for low light environments and/or a malevolent, devious nature. The evolutionary history of these species was most likely marked by a heavily Machiavellian set of relationships, in which the advantageous use of deceit and cunning was highly successful (Figure 23). As such, Dark Pokémon may have a number of kind facades or personas with which they gain the trust of other individual humans or Pokémon. Erratic or concealed behaviour would have also been very advantageous for Dark Pokémon, appearing to act randomly to foes proves an intimidating tactic. Physical moves are occasionally executed directly, but more commonly indirectly, at unsuspecting foes; special typed moves involve manipulation and deception to take advantage of the opponent. Dark-typed species have evolved a characteristic form of energy which can be ejected at foes, these beguiling pulses have the capacity to cause physical damage, howeve The strategy of Dark-type Pokémon often relies on calculated battling as opposed to brute force.
Many of the other Pokémon types proceed in a turn-for-turn based battling approach, it has been theorised that this way of battling has been selected for by members of the opposite sex as it indicates fairness and other favourable attributes for a partner. Dark Pokémon followed a different evolutionary path in which displaying for fairness was not selected for; Dark Pokémon act advantageously and not in accordance with ‘fair’ battling, thus giving rise to their characteristic ‘unpredictable’ battle style. These Pokémon often have especially powerful physical attacks.
The cunning and unpredictable nature of Dark Pokémon allow them to circumvent the predictive capacities of Psychic Pokémon. Dark techniques often involve an element of randomness, even when performed by non-Dark Pokémon. The erratic firings within the minds of Dark-typed Pokémon are unable to be interpreted by Psychic Pokémon, making these Pokémon immune to the attacks of Psychic energy. The tactics of Dark Pokémon, including their techniques, are able to penetrate the eluding nature of Ghost Pokémon. Dark-typed moves can frequently strike Ghosts before they have the opportunity to become invisible and avoid the attack.
Advantages
Super effective - Ghost & Psychic
Resistances - Dark & Ghost
Immunity - Psychic
What was your favourite type? Which type had the best, complementary illustration? Any parts unclear?
Let me know what you think:
Figure 6: Tentacool (Lymphosoma rhodotrabus), a blue Water/Poison dual typed Pokémon species floating in the ocean. This is the basic stage of a two stage evolutionary line
Figure 9: An Oddish (Inseronoxius bulbus) planted in the soil during the day, photosynthesising. The cells of this Grass/Poison species produce carbon compounds during the night time whilst this Pokémon travels around above ground. This is the basic stage of a three stage evolutionary line (Inseronoxius)
Figure 14: Stunfisk, (Platyicthyes electropelos) a Ground/Electric dual typed species. Members of this species sit at the bottom of shallow freshwater water bodies and camouflage with the sediment. Platyicthyes lie in wait for their prey to unknowingly step on them, after which they surge powerful electrical currents through the unsuspecting foe's body

Figure 18: Golem, Petrosoma gedynam, the final stage of the Petrosoma, Rock/Ground-type family. This rarely spotted Pokémon species thrives in mountain habitats, using it's boulder-like body to camouflage against the scenery. The body of P. gedynamu is composed of mud-stone which is shed, and compressed many times through it's lifespan

Figure 21: Clock-wise from top: (i) water sprayed by an Ice-typed Pokémon that has instantaneously been frozen to produce icicles. (ii) A macroscopic view of a frozen leaf; plant material can freeze solid purely in the presence of an Ice-typed Pokémon. (iii) A microscopic view of the internal cellular damage caused by the formation of ice crystals; Ice techniques are super effective against Grass Pokémon as vital functions are unable to be performed during periods of frost
Obligate mutualism – a type of mutualism in which the species involved are in close proximity and interdependent with one another in a way that one cannot survive without the other

Figure 23: A gang of Gladimalus, Dark/Steel-typed Pokémon abusing a human in the city. Both members of the evolutionary line are pictured; the basic-stage smaller individuals, Gladimalus mindinos, take orders from the large, humanoid species, G. apotemno. The base form species, Pawniard, form packs and perfom malevolent acts at the commands of the final evolution, Bisharp. These Dark Pokémon compete mercilessly amongst themselves to ascend ranks and command more respect; this species has served as a productive study species for determining the evolutionary history of Dark-typed Pokémon
Extrusive – derived from magma poured out or ejected at the Earth's surface. Used of igneous rocks

Speciose – rich in number of species


Table 1: Type effectiveness chart, image obtained from