This sounds just like 100% except the first medal that is to defeat bowser and the badges you get after that. Since you need to get all 10-flower-coins and all top of flags for the badge marathon anyway. I mean I think you can skip the 10-flower-coins in badge marathon in this category

Do it the way do you think it's faster. Those are the only rules.

Start doing the Any% with Major Glitches and then grab the royal seeds you skipped

You can make the same category as postgame only.

Start a new file, do Cap and Cascade (1) normally (as any%), Do World Peace of Sand and talk with the taxi guy at the end. Do Lake,Wooded,Cloud and Lost normally(as any%), Do world peace of Metro and talk to the taxi guy at the end. Go for Snow first(because It's a little bit faster ti go to the portal), do World Peace, put the moons in Odyssey, quit travel and go for the portal to Cascade and talk with taxi guy. Go to Seaside from Cascade. Do Seaside normally (as a any%). Go for Luncheon, do the world peace in that and talk with the taxi guy at the end. Do Ruined, Bowser's and Moon (1) as any%, Beat the any%. Instant leave from Mushroom 1 to Moon 2 and talk with taxi guy. Back to Mushroom (2) and talk with the taxi guy. Go for Sand (2) and talk with the taxi guy and the run is over.

2p banned. No more rules!!!!!