Maushold @ Black Sludge  
Ability: Friend Guard  
Tera Type: Dark / Ghost
EVs: 252 Spe  
Hasty Nature  
IVs: 6 HP / 0 Atk / 0 Def / 0 SpA / 0 SpD  
- Substitute  
- Tidy Up  
- Taunt  
- Encore / Baton Pass / Thunder Wave / Copycat

Maushold-Four @ Sitrus Berry / Pecha Berry
Ability: Friend Guard  
Tera Type: Dark / Ghost
EVs: 252 Spe  
Naive / Hasty Nature  
IVs: 1 HP / 0 Atk / 0 Def / 0 SpA / 0 SpD  
- Switcheroo  
- Substitute  
- Tidy Up  
- Taunt / Encore / Baton Pass / Thunder Wave / Copycat

Maushold

Maushold's greatest asset in The Loser's Game is its unique move Tidy Up, which notably removes hazards and Substitutes (both yours and the opponent's) while self-targeting, thus dodging both Gholdengo and whiffing on Pokemon switched into and KOed by entry hazards. It even raises Maushold's Speed (very good) and Attack (harmful) by 1 stage each! With Black Sludge, Maushold can 4HKO itself with Subtitute-Tidy Up-Substitute-any non-pivot move! Be careful about Maushold's good-but-not-awesome 111 base Speed, though, especially the part where it is slower than Cinderace. Maushold also has a great movepool, with access to Switcheroo, Taunt, Encore, Baton Pass, Thunder Wave, and Copycat. Maushold's other abilities actively harm it in The Loser's Game, so all of them should use Friend Guard. 6 HP IVs is the best on Black Sludge sets to enable the self-4HKO by making its max. HP divisible by 8, while 1 HP IV is best on Sitrus Berry Switcheroo sets so Sitrus Berry activates as rarely as possible. Both Naive and Black Sludge Maushold are guaranteed OHKOed by Gholdengo Steel Beam, but as a hazard remover, Maushold is the rare Pokemon that may want to avoid being OHKOed! Tera Dark lets Maushold dodge Pranksters, while Tera Ghost lets it escape trappers and is better in non-Baton Pass sets.

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