No, no, I said the Pokemon that descend from your species will wind up having strange powers. You're just a normal, uh, housecat? I think? Natural history, not my strong point.

No Beedrill here, honest. Look- if I was just messing with you, or crazy, or whatever, then how do you explain the fact that I look different from the mice you know?

[...Granted, Pikachu has no clue what a normal mouse looks like. He's assuming they're wildly different, though, based on what Hollyleaf mentioned about his color and size.]