Mabosstiff @ Toxic Orb  
Ability: Guard Dog  
Tera Type: Ghost / Ice / Rock
EVs: 252 Spe  
Naive Nature  
IVs: 0 HP / 0 Atk / 0 Def / 0 SpA / 0 SpD  
- Substitute  
- Taunt  
- Roar  
- Protect

Mabosstiff

Mabosstiff has a small niche as a Pokemon immune to phazing (thanks to its unique ability Guard Dog) that can itself phaze with Roar. Thanks to being a Dark-type, it also pretty much ignores Pranksters, and it even gets to punish them with Taunt. This lets it be a great Pokemon to Perish Pass to in more dedicated Perish Pass teams. Mabosstiff needs to be Naive (or use Black Sludge) in order to be guaranteed OHKOed by Gholdengo Steel Beam. Note that Toxic Orb lets Mabosstiff KO itself faster since it tends to stay in. Tera Ghost lets Mabosstiff escape trappers instead of needing to Roar them out, while Tera Ice makes Mabosstiff weak to Steel Beam and Stealth Rock, and Tera Rock makes Mabosstiff weak to Steel Beam and Chloroblast (to the point that Electrode-H Chloroblast OHKOes Naive it).

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