Description:
From the source:
“Charizards design is based on a Dragon.
Cyndaquil is a Fire Mouse Pokemon. Rats and Mice are in the same genetic subfamily.
Torchic is a Chick Pokemon.
Chimchar is a Chimp Pokemon. Chimps and Monkeys are both simians, and Chimchars evolutionary line physically resembles Monkeys rather than Apes.
Tepig is a Fire Pig Pokemon.
Fennekins design is based on a Fennec fox, which is in the same genetic family as dogs.”
(Seems to be speculation tho, so take it with a grain of salt, yo.)
<sub><sup>Also, this template was the best I could find, and edit.</sup></sub>