Toxicroak @ Sticky Barb  
Ability: Dry Skin  
Tera Type: Dark / Ghost / Ice / Rock
EVs: 252 Spe  
Timid / Hasty Nature  
IVs: 4 HP / 0 Atk / 0 Def / 0 SpA / 0 SpD  
- Substitute  
- Taunt  
- Encore  
- Baton Pass / Sunny Day

Toxicroak

Toxicroak is the current fastest Pokemon with both Taunt and an ability that injures it in Sun (Dry Skin in Toxicroak's case), thus giving it a small niche. In fact, Toxicroak can also use Encore, Baton Pass, and even Sunny Day so it can amplify its own self-injuring! As a part Poison-type, Toxicroak is stuck needing to hold Sticky Barb. 4 HP IVs make Toxicroak's max. HP divisible by 8 so Toxicroak can KO itself faster (e.g. self-3HKO in Sun). Toxicroak is guaranteed OHKOed by Gholdengo Steel Beam after Sticky Barb damage no matter which nature it uses, so it can use Timid for weaker Struggle or Hasty to take more from opposing Struggle. The usual Tera type choices are Tera Dark to dodge Pranksters, Tera Ghost to escape trappers more easily, Tera Ice to become weak to Stealth Rock and Steel Beam, and Tera Rock to become weak to Steel Beam and Chloroblast.

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