>>15047258Don't listen to him. There's a postgame, in two legendaries (one is in Terminus Cave, and the other is in the cave in the Pokemon Village.) There's the Battle Mansion, which is increasingly difficult battles to challenge your team and encourage you to try different stuff. There's also the Mega Stone hunt, which can be activated by doing one battle in the Battle Mansion, defeating Serena/Calem in the same city (towards the north) and then flying to Anistar City and finding Sycamore. Not only does this let you look for Mega Stones, you can also do some Looker missions in Lumiose.
In my opinion it's a lot better than any of the Gen V postgame, it could use a bit more story stuff, and a Battle Frontier, though.