I’m not entirely sure Pokemon Colosseum counts as a spin-off, but I had a lot of fun with it when I played it years ago! The concept of purifying shadow Pokemon was pretty interesting, and you couldn’t even catch them in the wild, you just had to steal them from the bad guys haha. Also you start out with both umbreon and espeon, yes please.
It’s really nice to just whip out my brush pens and markers every once in a while. I’m usually so hung up on making my lines really clean and precise (which I like) but it feels nice to draw more loosely too.