So I was lurking Orange Islands like I do, and came across a post regarding the Greninja "forme" that was announced in CoroCoro a while ago; apparently it's Mega Greninja!
If true, this sounds really scary. The thought of (potentially) a faster and/or more powerful Greninja with a free item slot is kinda ridiculous. Orange Islands doesn't allows speculating, but I'm cool with all the speculating you can handle (as long as it's relevant to the BSS meta). Could the other starters get a similar treatment? It would make sense. What would either of them need to become relevant in the metagame?According to the anime, Ash-Greninja is a Mega.
http://kasuria.tumblr.com/post/138689848606/shelgon-mega-evolution-energy-is-detected-by
The justification for it not requiring a Mega Stone is that Ash and Greninja have a stupidly strong bond.
If this carries over to the games, Ash-Greninja gets to be like Mega Ray and have item slot freedom.