Circinus.

[Armin correct the name a little absently, trying to figure out the mystery of the mysteriously appearing move.]

I know when you breed pokemon, you can sometimes breed them to have moves they normally would not. Perhaps that is what happened? Whoever bred the egg you received bred it from parents with that move?

[Or something like that. Armin isn't a breeder, most of this is a mystery to him.]

Sure.

[Armin had seen him just after hatching, but it'd be nice and see if he has grown any.]