>>32002306Battle Frontier.
More customization options.
Old Contest mechanics brought back, along with online Contests being an option.
More Ribbons to collect.
Return of PSS.
Jam packed post-game.
Pokemon learning moves they should have already (Slack Off Snorlax for example). And much-needed Tutor Moves for other things. (Silvally gets Recover and Extremespeed.)
Ghost Eeveelution.
I'm sure there are a ton of things I've missed, but these are just off of the top of my head.