Why does that exist, there is no purple coins to collect and collecting all normal coins isn’t even required?

100% no items Any% with items

Oh okay

Maybe the name of the cateogry should change, something like "No Powerups" 100% doesn't fit here, you're not collecting anything extra, and you don't necessarily have to follow the % theme with category names. 100% would make more sense for collecting all coins in the endless mode.