Stakataka

Stakataka is a great defensive Pokemon thanks to its incredible bulk, great utility, and strong defensive typing, which let it check Pokemon like Salazzle, Talonflame, and Sylveon. Unlike other Steel-types, it's neutral to Fire and can threaten Fire-types like Salazzle and Talonflame with its STAB Rock-type moves. Offensively, Stakataka has a good Attack stat, which, in tandem with its low Speed, gives it an extremely powerful Gyro Ball. This makes Trick Room variants quite lethal. If Stakataka claims one KO, Beast Boost can allow it snowball through the opposing team. However, its typing does leave it 4x weak to both Fighting and Ground. Also, Stakataka is more vulnerable than other Steel-types to bulky Water-types like Vaporeon and Quagsire.