Pokémon X and Pokémon Y

By the way, for anybody wondering if there is a better grinding spot post-game then the E4 I think i've definitely found one..

Restaurant Le Wow, specifically the rotation battles. It consists of 3 level 68 Pokemon and you battle different trainers consecutively for EXP and money. Each perfect run earns you 25 Balm Mushrooms, and if you are using an Amulet Coin, that equals to about 250,000$ (that is with the 100,000$ entry loss included) money gained per run. And the EXP is just as good as E4 if not better since it is pretty quick (no annoying 1491581hour long animations like E4.) You can run it as much as you want as well. Really good if you have one really high level mon and then 2 low level mons in the back. Just never rotate to them and they leech even more EXP then normal.

Oh and one of the trainers has a lv68 Audino! Dat EXP.

Don't forget the entry fee drops down to 90k or so after you run it enough