Bisharp

Thanks to an excellent ability, high Attack, and dangerous STAB moves, Bisharp has no problem threatening opposing teams. Defiant is one of the best abilities in the metagame because it punishes common Intimidate users such as Landorus-T and Gyarados for switching in, as well as letting Bisharp take advantage of moves such as Icy Wind and Snarl for free Attack boosts. Knock Off makes Bisharp very difficult to switch into while dealing large amounts of damage, and Sucker Punch lets it take out frailer Pokemon and helps compensate for its middling Speed. While Bisharp does suffer from frailness coupled with weaknesses to common Fire-, Fighting-, and Ground-type attacks, these issues are not enough to stop it from being an excellent attacker.