While I understand and even like why Greninja's got white gloves here, I'd still make a version with the normal hands. Just for versatility of use.
the feet are also off, and I dunno how you'd accurately convey it in such a small sprite, but one of Greninja's iconic traits is the way the legs simulate pants with the thick thighs and small lower legs- this becomes egregious here, especially in the pixel art.
EDIT: hopefully you won't mind the sloppy edit
![[Image: efb8a4798ad4fe553b396f7a4e104046.png]](http://i.gyazo.com/efb8a4798ad4fe553b396f7a4e104046.png)
the feet are also off, and I dunno how you'd accurately convey it in such a small sprite, but one of Greninja's iconic traits is the way the legs simulate pants with the thick thighs and small lower legs- this becomes egregious here, especially in the pixel art.
EDIT: hopefully you won't mind the sloppy edit