Rankings of the few Spinoff's I played:
1.Mystery Dungeon Explorers of Time: This game is SO good
2. TCG for Gameboy: I had this one when I was really young, lost it, then my brother got it as a gift. I love the music, and found it something nicely different and yet the same to the games and TCG.
3.Rumble: I bought this game after playing the demo, and, though it's very basic game-play wise, it's really fun with friends. Don't hate on it!
4.PBR; I will bash it a bit for the local stuff being TERRIBLE and the lack of uber restriction online, but I liked it for events/ cool battles and the awesome announcer.
5. Ranger: I dislike ranger out of all of them. I just do. Tried it, didn't like it at all.