Best Pokemon spin-off?

1. Pokemon Mystery Dungeon #1 and #2.

2. Pokemon Conquest.

Mystery Dungeon was not only fun, it was challenging. I loved it. That moment when you face The Grandmaster of All Things Bad...

Conquest was genius. Take Pokemon and Japanese Warlords and put them in a blender. The outcome was amazing.

Rumble/Rumble Blast were fun. You can beat the shit out of other pokemon. And playing along with 3 other friends aswell.

Rumble was actually a really fun game tbh.

And then there's Pokemon Battle Arena/Crater. Love it <3

Crater doesn't count as it wasn't official, but yeah, it was fun while it lasted.

Pokemon Colosseum and Pokemon XD were my favorites.

I liked Colosseum because I believe that was the first game with a "3D" feel to it. Or was XD before that?

Colosseum was first, however I only played XD. It was still awesome.