One category that would be fun for miscellaneous would be Giant Snoball Slalom, one of the Wario minigames. It wouldn’t be hard for people to complete and could be competitive

Hmmm... This would be a great idea if this had category extensions like Mario Party where it has certain mini games for categories. Cool idea though!

Speedrun.com for this game is really more about the actual main game, I know there are various leaderboards for the minigames in other places though