would buying a 2DS and X/Y be worth it if that's the only game I'll ever play on it? would go for a 3DS but it doesn't make sense to pay an extra $40 for eye-straining 3D and .. hinges.
That's your choice
I'm not sure a single game is worth $170 but you might find some other 3DS titles you like now or in the future, plus if another Pokemon game is released before the next generation of handhelds comes out it'll be on 3DS as well
A couple new Megas: Mega Pinsir, Bug/Flying with an ability that turns Normal moves into Flying move

Mega Banette which gets Prankster

Mega Tyranitar which appears to only get stat changes and Mega Aggron which goes pure-Steel and gets the ability Filter
