Mamoswine

Mamoswine is a solid wallbreaker in OU thanks to its great Attack combined with an excellent offensive typing, that makes it difficult for many teams to switch into. Its typing coupled with decent overall bulk allows it to work as a great check to common Electric-types in the tier. A decent ability in Thick Fat also gives it valuable resistances to Ice- and Fire-type moves and grants it more opportunities to switch in. However, Mamoswine sits at a low Speed tier that, in tandem with relatively low bulk, leaves it a glass cannon that can't outpace premier OU threats. It also faces competition from Weavile, which boasts a better Speed tier as well as STAB Knock Off, though Mamoswine has a more useful Ice / Ground typing as well as more power and bulk. Mamoswine faces further competition from Kyurem-B, which has much more bulk and versatility in addition to much wider movepool and a solid niche as the only specially based Ice-type in OU. Lastly, Mamoswine struggles to break past certain Steel-types, such as Skarmory, Ferrothorn, and Mega Scizor.