I honestly am baffled beyond belief to see this in C+. It' super good and one of the few mega glalie switch ins. It not only has access to rocks and the ability to beat every hazard remover not called shiftry lee or hitmontop 1 on 1. Ice/Ground is simply put it one of the best offensive type combos in the game and doesn't have many resists in the tier(bronzong is the only relevant one i can think of). Not only that when you factor in eviolite piloswine has 100/130/99 bulk which is great for an offensive poke. It also can check heliolisk really which is becoming more relevant as of now because it lives focus blast:252 SpA Life Orb Heliolisk Focus Blast vs. 252 HP / 0 SpD Eviolite Piloswine: 205-242 (50.7 - 59.9%) -- guaranteed 2HKO after Stealth Rock and it ohkos back with earthquake. It can even beat non curselix 1 v 1:
4 Atk Mega Steelix Heavy Slam (120 BP) vs. 252 HP / 4 Def Eviolite Piloswine: 168-200 (41.5 - 49.5%) -- guaranteed 3HKO and piloswine is faster and 3hkos in return.