Oh, so you started with it! I guess that explains it. Come to think of it, I don't know if I've ever seen mine in the wild at all.

[Well, ONE of them, anyway, since Rocket grunts get two whole Pokémon to start with, and the one he's not talking about right now is a Magikarp... And, uh, the process of having Pokémon given to you by Team Rocket is probably a little different than having your fake mom give you one, or however that goes... but still!]