Rotom-W @ Leftovers / Sitrus Berry
EVs: 248 HP / 28 Def / 232 Spe
IVs: 0 Atk
- Hydro Pump
- Volt Switch
- Thunder Wave / Pain Split
The key difference from standard here is the EVs. The analysis spread is max defense and technically this is allowed.
Basically the aim of this set is to outpace certain 'mons to Wisp or T-wave or Hydro before they can move. The listed EVs outpace jolly Mega Tyranitar (this creeps the crowded 70 speed tier while minimising the risk of speed ties with the sheer volume of other creepers) while maximising overall bulk with the remaining EVs. Sitrus is better on more HO builds (credit to AM for this) whereas Lefties is better on more balanced/BO builds.