Aurorus

Aurorus's access to one of the best offensive STAB types in the tier, Ice, and Refrigerate, which boosts its Normal-type moves to monstrous power, make a potent offensive threat. It has a niche over similar wallbreakers such as Exploud with its useful utility moves, Stealth Rock and Rock Polish. Aurorus is a good user of Stealth Rock because it is able to threaten nearly every Defog user with its Ice-type STAB moves, and it can even clean offensive teams thanks to its ability to outspeed the entire tier after a Rock Polish boost. However, Aurorus still possesses an extremely horrible defensive typing that gives it six common weaknesses, including 4x ones to Steel and Fighting and a weakness to Stealth Rock. This, coupled with its low Speed before a Rock Polish boost, limits its ability to switch into attacks and set up. Finally, Steel-types such as Bronzong and Escavalier can easily counter Aurorus, meaning it needs team support to weaken these Pokemon before it can substantially threaten the opposing team.