It would be known as Low% if power ups weren't allowed.

The only thing is thought that checkpoints make you big as if you just took a mushroom, which is considered a power up, so your run would be invalid either way.

Sorry.

If you could get Ewaller's attention, he might do it.

Well, I sent him a PM on Twitch and he hasn't replied yet, but you're one of the people I requested he add as a mod.

There would be a category if you can only beat the game with mushrooms only allowed by checkpoints and not inside an item block.