all credit to z0m for the set -- it is entirely his and not mine
Tapu Fini @ Leftovers
Ability: Misty Surge
EVs: 248 HP / 8 SpD / 252 Spe
Timid Nature
IVs: 0 Atk
- Moonblast
- Soak
- Calm Mind
- Taunt
The idea is to not only increase the odds of sweeping with Tapu Fini thanks to Soak making various pivots a Water type, thus hurting their STAB attacks and neutralizing Moonblast damage, but also to help teammates such as Thundurus-Therian, Tapu Koko, Serperior, TBolt SG Magearna, etc. find openings. This is a really cool, underappreciated concept and while it may be a bit inconsistent, I still think that there's a lot of niche there that should be explored.