>>22192095>Deo-DIt's a virus that poisons the metagame with pure hyper-offense. Deoxys-D and Deoxy-S are the best leads in the game, and can basically guarantee their users at least two layers of hazards at the start of a match.
>Mega MawileHighest effective Attack stat in the game, best defensive type combination in the game, wide physical movepool with shit like Sucker Punch and Swords Dance. Probably the most devastating of the things you listed.
>SwaggerLuck-based tactic that just about everything can abuse, sorta like how Evasion is banned; Steel nerf + Foul Play + Booboo keys pushed it over the edge.
>AegislashKingmaker that exerted incredible pressure on the shape of the metagame around it. I miss Aegislash.
>>22191906Since Greninja is the only Pokemon with Protean that's actually a problem, banning the ability is a poor solution. When other Protean users start causing problems, we can start talking ability ban.