Tyranitar @ Black Sludge
Ability: Sand Stream  
Tera Type: Ghost / Ice
EVs: 252 Spe  
Timid / Hasty / Naive Nature  
IVs: 2 HP / 0 Atk / 0 Def / 0 SpA / 0 SpD  
- Substitute  
- Taunt  
- Protect / Curse / Stealth Rock
- Thunder Wave / Curse / Stealth Rock

Tyranitar

Thanks to its part-Dark typing letting it dodge Pranksters, Tyranitar is the best Sand Stream user in The Loser's Game. The Sand that Sand Stream conjures can provide helpful chip for teammates as well as opponents (though not most Steel Beam users). It can take advantage of Pranksters switching out with Taunt and Thunder Wave, and it even has access to Stealth Rock (for nuttier Court Change teams) and Tera Ghost Curse. Tyranitar often needs to switch out to spread chip to teammates, so it prefers Black Sludge. Tyranitar is almost but not quite guaranteed OHKOed by Gholdengo Steel Beam if Naive, so it can use a Timid or Hasty nature instead for weaker Struggles or to take more from opposing Struggle. 2 HP IVs make Tyranitar's max. HP divisible by 8 to facilitate the Sub-Tera Ghost Curse self-2HKO. Tera Ghost lets Tyranitar escape trappers, while Tera Ice makes it weak to Stealth Rock and fit in Court Change teams better.

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