The problem with adding more categories is that there's really nothing else to add without making something really arbitrary

Kill All Enemies is too arbitrary imo.

I don't know how glitchless would work... I presume no elevator skip.

No Elevator Skip doesn't really add anything to the run tho, if the elevator sequence was longer and had more challenge than it might work, but the elevator sequence is pretty much just an auto scroller, honestly who would run the game without elevator skip?

Die%. It speaks for itself.

Die% is WAY too arbitrary

What about an "Only Hit Bowser" category?

Or a Hardcore category (Something like "No A+Jump and no tab switch")

Just came up with a "No damage taken" category idea

Jokes on you. We added your category ideas. I mean, all of them.