I tried doing this ages ago, but successfully failed at finishing it (oxy-moron much?). Let's compile a diagram of Pokémon species in a family tree manner. The first tier would consist of the obvious God/origin Pokémon:
Note 2: The bottom tier consists of Pokémon created by man, those that stem from man-made creations, of truly unknown origin, or from outer space. In other words: Pokémon who do not derive genetically from other species.
Note 3: I believe that all Ghost Pokémon derive from Giratina since it is the closest species to the origins of all Pokémon that is Ghost type. This is a touchy subject seeing as how ghosts are generally seen as post-dead beings. In the Pokémon world, "ghost" seems to be a state of being where one is not completely ethereal and is in some way tied to darkness (being what Giratina governs), which may also relate Ghost Pokémon to Darkrai, who I've yet to give a position in this chain.
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CANINE
FELINE
PRIMATE
HUMANOID
RODENT
BEAR
UNGULATE
SEA MAMMAL
MARSUPIAL
WEASELS, ETC
CATDOG/OTHER
BIRDS
GROUNDED/AQUATIC BIRDS
LIZARDS
SHELLED REPTILES
SNAKES
DRAGONS
FISH
BIG FISH
AMPHIBIANS
Note 1: The fossil tier is where the true genetic tree should branch from - where most Pokémon species are going to stem from. The Legendary tiers before them are there simply because those Pokémon are, well, legends with origins tied directly to other legendary Pokémon. The genetic chain of Pokémon stem with Mew>fossils>all else.Arceus // Mew
Dialga, Palkia, Giratina // Azelf, Mesprit, Uxie // Ho-oh // Lugia // Celebi // Jirachi // Manaphy // Darkrai // Cresselia // Shaymin
Raikou, Suicune, Entei // Articuno, Zapdos, Moltres // Latias, Latios (?)
---
[Omastar // Kabutops // Aerodactyl // Cradily // Armaldo // Relicanth // Rampardos // Bastiodon]
Tentacruel, Cloyster, Clamperl // Kingler, Crawdaunt // Charizard, Dragonite, Salamence // Tangrowth // Yanmega // Gyarados, Milotic, Kingdra // Tyranitar // Rhydon, Aggron
...
...
Mewtwo // Porygon // Unown // Regis // Grimer // Koffing // Magnemite // Voltorb // Rotom // Clefairy // Solrock, Lunatone // Deoxys
Note 2: The bottom tier consists of Pokémon created by man, those that stem from man-made creations, of truly unknown origin, or from outer space. In other words: Pokémon who do not derive genetically from other species.
Note 3: I believe that all Ghost Pokémon derive from Giratina since it is the closest species to the origins of all Pokémon that is Ghost type. This is a touchy subject seeing as how ghosts are generally seen as post-dead beings. In the Pokémon world, "ghost" seems to be a state of being where one is not completely ethereal and is in some way tied to darkness (being what Giratina governs), which may also relate Ghost Pokémon to Darkrai, who I've yet to give a position in this chain.
____________________________
____________________________
CANINE
FELINE
PRIMATE
HUMANOID
RODENT
BEAR
UNGULATE
SEA MAMMAL
MARSUPIAL
WEASELS, ETC
CATDOG/OTHER
BIRDS
GROUNDED/AQUATIC BIRDS
LIZARDS
SHELLED REPTILES
SNAKES
DRAGONS
FISH
BIG FISH
AMPHIBIANS