In 1850 however, when a female West-Highland Terrier gave birth to a litter of Lillipups, people began to realize that Pokemon did come, in fact, from normal animals. This caused several theories to spring up until in 1976 the young Pokemon Professor Samuel Oak discovered a virus in one of his samples. First, he believed it to be a contamination, but then curiosity got the better of him. He noted a section in the virus’ DNA he found oddly familiar. In a sample of his Charizard’s DNA, he recognized the exact same section of viral DNA. This lead to a breakthrough in Pokemon research, explaining exactly where Pokemon came from: The ‘Pokerus’ Virus affects the reproductive organs, slipping its genetic information into its hosts gametes and changing the offspring to mutate into Pokemon.”
Frogs and salamanders. Bet you didn't see that one coming.
They include: Poliwag, Poliwhirl, Poliwrath, Politoad, Tympole, Palpitoad, Seismitoad, Croagunk, Toxicroak, Geodude, Geodude Aloan Form, Graveler, Graveler Aloan Form, Froakie, Frogadier, Greninja, Grimer, Grimer Aloan Form, Muk, Muk Aloan Form, Mudkip, Marshtomp, Swampert, Mega Swampert, Wooper, Quagsire, Slowpoke, Slowbrow, Mega Slowbro, Slowking, Lickitung, Lickilicky
-I will not make an Ash Greninja
-Grimer and Muk can survive in toxic conditions, becoming toxic themselves. Their Aloan counterparts' colorful appearance is to warn others.
-Geodude and Graveler are not related to Golem (which is a tortoise). Instead, Golem likes to hide its eggs among groups of Geodude in hibernation
-Poliwhirl grows different, depending on its surrounding. If it is wet, it will turn into Politoad, is it dry, it will turn into Poliwrath.
-Slowpokes that do not leave the water become Slowking.
-Seriously, I will not make an Ash Greninja
PLEASE NOTE: This is how I see the Pokemon. It is fine to be of different opinion, but please tolerate mine.
Bears and Weasels
Rodents and Rabbits
Spiders and other Arthropods
But then I've seen its face and the fact they have arms, and then I thoughtof big fat frogs.
They like laying their eggs into caverns or large shells like those of freshwater Shellder- which has nothing to do with real sea-water shellder, by the way. So it is not unusual to see Slopoke and/or Slowbro sitting inside shells.
Mind you, the growth into Slowbro only happens if the young Slowpoke larva actually leave the water. If not, they retain their gills and remain in water, but grow armor on their head to break open ice for air in winter.
I mean each one of the categories. That would be fun to see.
*holds Mega Slowbro next to ear*
"The Bro has spoken..."
Well,some still have abilities,with charizard being able to spit a hard fire to fight for dominance in groups and to literraly ''Cook'' food,or claunchers launching powerfull water beans to stun prey.
But eh,i don't think you could see a giant three headed flying nocturnal hydra and say it's just a regular animal
''Oh,indeed,i'm talking my sand-digging shark-dragon for a walk too.''
Poliwag, tympole and palpitoad: tadpoles
Poliwhirl and poliwrath: Bullfrogs
Politoed: tree frog
Croagunk, Toxicroak and Greninja's line: Dart frogs
Seismitoad, Geodude and Graveler: Toads
Grimer and Muk: Goliath frogs
Lickitung, Lickilicki and slowpoke lines: Salamander
Quagsire, Wooper and Mudkip line: Newts
They just prefer standing on all four.
I'm watching you, Mudkip
As for growing more limbs as they mature- Frogs do it too.