I see a pattern indeed, but I don't really think GF is forced to stick to it when designing the pokémons. I think it goes more like
A: let's do a fire mouse!
B: oh, sure, what about this drawing?
A: it looks cool, but more like an echidna, no?
B: ah, we can play with it too.
[Cindaquil is born]
>>28992735>Saying a fox is like a dog is like saying a giraffe is like a horse, or that a deer is like a goat, or that a dove is like a chickenNo. Saying that a fox is like a dog is like saying a zebra is like a horse, or that a deer is like a caribou, or that a dodo is like a flightless dodo.