[Gaston buzzes his wings in response. Michael does nothing to curb this behavior.]

Huh. Looked kinda like a wind thing. [Luckily, you have Michael the Living Sinnoh Pokedex here!] Glameow doesn't learn any attacks like that naturally - although you can teach them something called Aerial Ace. They don't learn Mirror Move, no Mimic...oh! There's something called Assist, lets them "use an ally's attack."