So, Weavile BUS is a very interesting Pokemon.
What makes it so good?
Rule of Evil is an attack, which for [C] does 60 to each Pokemon with abilities. This is nuts. It 3HKOs Tapu Lele GX, 4HKOs Gardevoir GX, and 5HKOs Metagross GX. With constant Weavile spam, you can severely wear down ability...