Mine is level 55 and I can only recall it learning Bulk Up. Its Fighting subtype feels like such an afterthought.
Not that it matters too much since I have Lucario AND Blaziken. ._. --- "Even I'm eatable! But that, my children, is called cannibalism; and that is frowned upon in most societies." - Willy Wonka 3DS FC: 0877-0631-2987
Check the move relearner. Greninja gets Night Slash through her. --- Official Manectric and Creator of the B/W, BW2, and XY Boards Clan Official Dawn of the BW2 Boards Khaini: ImSooBipolar - 14x Luminous
It can learn night slash in its final form, but your have to use the relearn old moves option to do so.......because night slash is learned for its final stage prior to actually reaching it. --- Its commonly known on Gamefaqs that if anything is more evident than proven facts, its personal opinions.