This game is basically an updated version of Pokemon Mystery Dungeon: Explorers of Time/Darkness (Which I never played, so this review might have too much praise in it). However, it never fails to be a heartwarming adventure.
The soundtrack is really good. I really don't know why, but I just find myself listening to it over and over. There's so many incredible tracks like Dialga's Fight To The Finish.
I also love the ending. Like any PMD game, I cried so hard. I know after a while you get used to them, but I love them a lot.
One thing is is this game is surprisingly dark for a Pokemon game. I'm not going to give too much away, but It shows visions of a bleak future, and at various points Pokemon actually try to kill each other. This is different compared to mainstream games.
I still love the game. It's awesome!