I've started with a Protean Froakie, but as the game goes on, it doesn't get too OP, certainly the lack of TM's such as Ice Beam, Scald, etc makes Greninja less of a threat, but there's still access to Dark Pulse and level up moves like Extrasensory, Shadow Sneak and so...
However, is Greninja actually the best one later in the game, or other pokémons have the potential to be more useful?
What you guys think?