>>20174168-You don't lure in Y-zard when it's already 2HKOed by Hydro Pump. They're not going to switch in. And hell you can run fucking HP Rock.
-U-Turn's power hardly matters, the delayed switch is what matters
-A 40 BP priority move, without Technician/Adaptability/good SE coverage, off of 95 base attack is hardly usable. Like you can pick off weakened opponents, I guess (EXTREMELY weakened opponents; only does 71.2 - 84.1% to Mega Gardevoir, who has 68/65 bulk and takes it for SE damage)
As compared to special greninja, you get:
>weak priority moves>stronger U-TurnAnd if you run special:
>use your slightly higher offensive stat>more coverage options (Grass Knot/Dark Pulse/Extrasensory/Hydro Pump/Ice Beam/any Hidden power, as compared to Rock Slide/Night Slash/Waterfall) which are all higher in BP and have better SE coverageIt's. Just. Shit. It entirely relies on your opponent both expecting special greninja, not having the capability to scout your moveset, and being able to RK or lure specific pokemon. Yeah you can OHKO Y-zard with Rock Slide, now what do you do against Keldeo with a moveset of Rock/U-turn/Sneak/Ice Beam? Can't run Extrasensory, you know.