Quoted By:
>Battle Bond/Specs
+50% special attack, 60 BP Water Shuriken
>Sheer Force/LO
+60% overall offense, freely switch moves
>Adaptability/Specs
+100% special attack
>Technician/Specs
+100% Water Shuriken
>Water Bubble/Specs
+150% water attacks
>Protean/Specs
+100% on coverage moves, +50% on water/dark, defensive typing switch
Protean is still the best ability for the defensive utility, and it also boosts the coverage moves by 50% after transformation. Normal Ashninja is checked by anything with a super effective move, Protean Ashninja checks anything slower than it which is most of the metagame.
However, Water Bubble is insane offensive pressure. Even with 2 hits, Greninja OHKO's most neutral targets in the rain:
252+ SpA Choice Specs Water Bubble Greninja-Ash Water Shuriken (15 BP) (2 hits) vs. 0 HP / 0 SpD Marshadow in Rain: 304-360 (94.7 - 112.1%) -- approx. 75% chance to OHKO
252+ SpA Choice Specs Water Bubble Greninja-Ash Hydro Pump vs. 248 HP / 56 SpD Assault Vest Tapu Bulu in Rain: 330-388 (96.2 - 113.1%) -- 75% chance to OHKO after Grassy Terrain recovery
252+ SpA Choice Specs Water Bubble Greninja-Ash Hydro Pump vs. 252 HP / 208+ SpD Ferrothorn in Rain: 336-396 (95.4 - 112.5%) -- 75% chance to OHKO after Leftovers recovery
>75% chance to OHKO
>Ferrothorn
>water move
jesus christ