Taunt + Bulk Up

Corviknight @ Leftovers

Ability: Pressure / Mirror Armor
EVs: 252 HP / 48 Def / 164 SpD / 44 Spe
Impish Nature
- Roost
- Taunt
- Bulk up
- Power Trip
Taunt + Bulk Up aims to capitalize on Corviknight's bulk and defensive typing offensively, offering a less passive approach to the steel bird.
Taunt was specifically thought of to prevent Toxapex from walling this set once ready to sweep, however, it also has other applications. Taunt allows Corviknight to be less passive in front of walls and setup sweepers, taking advantage of them. It is also useful for keeping out hazards and hazard removal. Bulk Up's benefits are obvious, increasing its Def and Atk that allow it to efficiently wall and threaten physical breakers and sweepers (barring Urshifu-R). Power Trip makes use of these tools while providing an offensive moveslot with less downsides than Body Press and Brave Bird.
Pressure is used over Mirror Armor as it allows you to stall out walls like Buzzwole, Clefable, and Tapu Fini. However, Mirror Coat has enough significant application that it can also be used.
The EVs are meant to take a 3HKO from +1 Kartana's Sacred Sword after rocks (non LO) and outspeed most slower Magnezone variants. The rest was thrown into SpD as no more was needed to complete any significant calcs in Def.
It is imperative to this sets' use that before it attempts to sweep without any significant boosts, its checks- such as Magnezone, Tapu Koko, Zapdos, Volcarona, Blacephalon, and Urshifu-R- must be weakened or removed.