The Move Copycat will use Gigaton Hammer every turn along as the opponent is prevented not use a different move. Meowscarada with high speed and attack, as well as the Protean ability, makes most Pokémon a one hit KO with Gigaton Hammer.
Yasss! Meowscarada has many tricks. He is a magician after all. And who would've thought I'd see a day where we see Meowscarada using gigaton hammer 😆. Good stuff!