Tapu Lele @ Choice Scarf
Ability: Psychic Surge
EVs: 252 SpA / 4 SpD / 252 Spe
Timid Nature
- Psychic
- Moonblast
- Hidden Power Fire
- Focus Blast/Thunderbolt
Scarf Lele was a prominent meta threat at the start of SM OU, but has since fallen off. Still, the combination of Psychic Terrain and high speed makes it a pretty solid revenge killer (when scarfed), or sometimes even a decent late game sweeper in the right situation.
Psychic terrain blocks both Water Shuriken and Sucker Punch, and can really mess with both these mons and can force switches if Lele is locked in or makes Priority a far riskier choice, and it can thus allow frail but fast mons to KO either of these. Lele can comfortably OHKO Greninja with Moonblast or Focus Miss, and does decent damage against Mega Mawile with HP Fire. That said, it is OHKO'd by play rough and there is a decent chance Knock off will too, so is more a nuisance than a check to Mawile. But its main niche is in its ability, and with Psychic Terrain up, both these mons are less effective and way more easily taken out. The scarfed set just does far better against Greninja than the others, but any Lele annoys these two a bit.