Source
Unlike other Pokémon species, which experience sudden and conspicuous biological changes during evolution, Larvitar retain much of their physiology. Their new anatomy layers on top of older body parts, rather than undergoing total metamorphosis.
Other popular illustrations
Alien tree specie sketches from an older sci-fi project
Werewolves of the southwest.
Birds of Johto
Bonus birds
Mammals of Johto. Anatomical Fig. i
Who would win?
Ugh, I've got yard-wolves again
Cyndaquil's respiratory and digestive system are interlinked. Air is exhaled through four respiratory orifices along its back, mixing with copious digestive gases. Each orifice has rough specialized tissue that grinds together to produce sparks and ignite the flammable mixture.
Unlike other Pokémon species, which experience sudden and conspicuous biological changes during evolution, Larvitar retain much of their physiology. Their new anatomy layers on top of older body parts, rather than undergoing total metamorphosis.
Godzilla Anatomy Fig. I
I guess you can have an English version
