Corphish @ Choice Scarf
252 Atk / 252 Spe / 4 HP
Corphish has great Attack but meh Speed, so why not use a Choice Scarf? Knock Off is great in LC to get rid of Eviolite and Berry Juice, Crabhammer and Razor Shell are powerful STAB, and Superpower allows it not to get completely walled by Steel-types. While Switcheroo might seem like an odd choice, it allows opponents to get locked into their move and essentially give you a free switch.