>>59012936>berry farmingFunfest missions or Join Avenue in game, or use Game Sync to connect to the Dream World, plenty of options
>Customize trainerYou can select your appearance to other players on your trainer card
>Battle FrontierThere's several facilities that are basically the same as previous battle facilities, the only remotely novel one is Pokestar Studios being kind of like Battle Sims from Gale of Darkness. It's not like restaurants which are just normal game versions of the Battle Institute, there's enough limiting factors to make them interesting.
>play the pokeathlonUnfortunately there's only one minigame in the game that doesn't use the basic mechanics of the game, the rest are in the Dream World so you'd have to use Game Sync for that.
>following pokemon/pokemon amieAgain, another thing only remotely in via Dream World
Now how do I transfer Pokemon in XY? Or where are all the interesting new post-game maps? Or maybe a Safari Zone that doesn't require another person, but does benefit from it like HGSS's? Or anything that isn't just the campaign and battling, really.