Due to personal reasons (feeling extremely bad about Nintendo's handling of fan-made content, mostly), I've pretty much lost all motivation to work on this.
I got the first 3 cups of the game done, and 2 of the Battle courses. Might be a few other unfinished courses in there too.
Only 3 of the 8 characters were fully replaced, everyone else will have busted palettes.
The game was play-tested in every game mode with a friend over net-play. Item rebalance was modified to make 2P more fun and allow for more comebacks.
Maybe one day I'll revisit it because I had a lot of fun making it, but for now my energy is non-existent.Download: https://mega.nz/file/imhWURqK#d-8G3CVbIkt8Lysgyg-fSZ5juOIVdeNIRtliul6CwpA
(Patch expects a headerless ROM -- I noticed bsnes complains about the patch, but it plays fine afterwards.)