Fairium Z Nature's Madness
Tapu Koko @ Fairium Z
Ability: Electric Surge
EVs: 20 HP / 252 Atk / 20 SpD / 216 Spe
Jolly Nature
- Wild Charge
- Nature's Madness
- Brave Bird
- U-turn/Roost
Here we have a physical Tapu Koko with Electric/Flying coverage + U-turn support.
The key of the set is Nature's Madness with Fairium Z in order to weaken a supposed counter (such as a Ground type like Gastrodon) to the point it is much more manageable.
Nature's Madness is a special move that doesn't require any EVs investment to work and it reduces the recoil when we have to finish the opponent with Wild Charge or Brave Bird.
Unlickily, you have to choose between momentum (U-turn) and longevity (Roost).
252 Atk Tapu Koko Brave Bird vs. 252 HP / 24 Def Ferrothorn: 94-111 (26.7 - 31.5%) -- 20.4% chance to 4HKO after Leftovers recovery (this is a KO after a Z-boosted Nature's Madness)
252 Atk Tapu Koko Brave Bird vs. 248 HP / 8 Def Gastrodon: 163-192 (38.3 - 45.1%) -- guaranteed 3HKO after Leftovers recovery (the same)
252 Atk Tapu Koko Brave Bird vs. 248 HP / 56 Def Amoonguss: 298-352 (69.1 - 81.6%) -- guaranteed 2HKO after Black Sludge recovery (the same)