LMAO. Check this out:252 SpA Protean Greninja Ice Beam vs. 252 HP / 112 SpD Hippowdon: 284-336 (67.6 - 80%) -- guaranteed 2HKO after Leftovers recovery
252 SpA Ash-Greninja Ice Beam vs. 252 HP / 112 SpD Hippowdon: 252-298 (60 - 70.9%) -- guaranteed 2HKO after Leftovers recovery
I created the second calc by changing Greninja's base SpA to 153 and removing Protean. For all attacks except Water and Dark moves, a normal Protean Greninja is stronger than Ash-Greninja, and Greninja didn't even run Water moves back when it was OU (it ran Gunk Shot/Ice Beam/Low Kick/Dark Pulse) - meaning that 3/4 moves are WEAKER if you use Ash-Greninja. On top of that, you don't get a Defense or SpDef buff at all, unlike, say MSharpedo, which might justify the drop in damage output. And ALSO, you don't get to play type changing mind games - you can never finish an opponent off with Gunk Shot so that you resist Mach Punch and avoid being revenge killed by a Conk or Breloom waiting in the back, for instance.
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