Mamoswine

Ground

Mamoswine functions as a powerful physical wallbreaker thanks to its incredible Attack stat, as well as its unique and nearly unresisted STAB combination. Notably, Mamoswine is the only viable Ground-type with access to a STAB boosted priority move in Ice Shard. This assists Ground teams by granting them the ability to revenge kill faster, weakened foes such as Mega Lopunny and Choice Scarf Tapu Bulu. Mamoswine also is incredibly useful for sweeping Dragon and Flying teams late-game, as both types struggle to switch into Mamoswine's Ice-type STAB moves. Because of Thick Fat, Mamoswine can offensively check foes with Ice-type coverage such as Alolan Ninetales for Ground teams. However, Mamoswine's typing is defensively terrible and leaves it susceptible to various types such as Steel and Water. Additionally, foes with type coverage such as Close Combat Zeraora can OHKO Mamoswine. Also, while powerful, Mamoswine has a predictable moveset that can be played around if pressured correctly. Despite Mamoswine being a powerful wallbreaker, physically defensive walls such as Skarmory and Mega Slowbro can tank its attacks and can recover their health.

Ice

Mamoswine is a staple pick for Ice teams due to its ability to effectively fill multiple roles, including a Stealth Rock user, Choice Scarf revenge killer, and wallbreaker. Its high Attack stat and Ground typing allow it to check many Fire- and Steel-type threats such as Torkoal, Heatran, and Magnezone. Its Ground typing also grants it a neutrality to Stealth Rock, which can allow it to switch in more often. Its solid offensive presence makes it one of the best Stealth Rock users for Ice teams. With the ability Thick Fat, Mamoswine can offer a Fire neutrality for Ice teams, and with Oblivious, suicide lead sets can negate Taunt users to freely set up Stealth Rock. Access to priority in Ice Shard allows it to pick off weakened threats. Mamoswine has a wide range of coverage attacks, including Stone Edge, Superpower, and Knock Off, which allow it hit Flying-, Normal-, and Psychic-types such as Mantine, Chansey, and Slowbro, respectively. With Endeavor and Ice Shard along with a Focus Sash, Mamoswine is capable of blanket checking important threats such as Mega Scizor, Choice-locked Keldeo, and Volcarona. With a Choice Scarf, Mamoswine can operate as an effective revenge killer capable of checking threats such as Mega Charizard Y, Tapu Koko, and Nihilego. Unfortunately, Mamoswine is susceptible to being walled by Pokemon such as Skarmory and Mega Slowbro. Its mediocre Speed stat makes it incredibly easy to revenge kill. Its Ice / Ground typing leaves it weak to common priority moves such as Aqua Jet, Mach Punch, and Bullet Punch. Even with a Choice Scarf, Mamoswine finds itself outsped by common Choice Scarf Pokemon like Victini, Terrakion, and Heracross.