there should be a 'super mario odyssey 64%' (or just smo64% or 64%) where you collect a star (mushroom kingdom moon) with the 64 shirt and cap on. and also should be a sunshine% where you go to seaside kingdom on the beach with the sunshine shirt and shades on
Smo64% is just any% getting extra coins on the way to buy one outfit at the end. So basically any% plus 2 minutes, which nobody would run.
Sunshine% is any% up to Metro then getting purple coins to buy an outfit in Seaside. Again this is too similar to any% to be a decent category.
https://www.speedrun.com/smoce/thread/ze0h9 and ye, in any case purpose sm64% as postgame or something if you want, but from new file you are basicaly doing a completly usual any% just adding 2 minutes of gameplay after the normal run and with sunshine is he normal any% till metro before you get to those points, nothing changes in the previous run
Actually, I don't think the Sunshine outfit becomes available until post-game, so it would be Any% (picking up some Luigi Hint Arts along the way), then buy an outfit and go to Seaside.
But yeah, if these runs sound like fun to you, do some runs of them and submit the idea in Tech's pinned thread: