Are you ready for the new _king of OU? Assuming +20 to speed, it outspeeds Starmie, Gengar, and Greninja with 252 Jolly. And even with just +30 to attack (so base 106), it does this:

>0 Atk Lopunny High Jump Kick vs. 252 HP / 0 Def Aegislash-Shield: 138-164 (42.5 - 50.6%) -- guaranteed 3HKO after Leftovers recovery
>252 Atk Lopunny High Jump Kick vs. 252 HP / 0 Def Aegislash-Shield: 174-206 (53.7 - 63.5%) -- guaranteed 2HKO

There are nearly NO ghosts that can switch in on Mega Lopunny's High Jump Kick

>b-but Gengar resists HJK!
>252 Atk Lopunny Return vs. 4 HP / 0 Def Gengar: 219-258 (83.5 - 98.4%) -- guaranteed 2HKO after Black Sludge recovery

>252 Atk Lopunny High Jump Kick vs. 252 HP / 0 Def Jellicent: 246-291 (60.8 - 72%) -- guaranteed 2HKO after Leftovers recovery

>252 Atk Lopunny High Jump Kick vs. 252 HP / 0 Def Golurk: 222-262 (58.1 - 68.5%) -- guaranteed 2HKO after Leftovers recovery

The only ghost that can take Lopunny is Cofagrigus, and it's what, RU? Not even Dragonite can switch in because of Ice Punch, and even Adamant Band ESpeed fails to OHKO with 4HP and +10 to defense.

Just imagine
>HP 65 -> 65 (+0)
>Atk 76 -> 106 (+30)
>Def 84 -> 104 (+20)
>SpA 54 -> 64 (+10)
>SpDef 96 -> 116 (+20)
>Spe 105 -> 125 (+20)

Are you ready, /vp/?