Goal of the category would be to start from a new file, make your way through the story until you beat the Dark Star, and then go back to the Challenge Node and complete all 7 classes of the Gauntlet. In my opinion, it could be a decently interesting category to run. Thoughts?

At that point just call it All Bosses, and beat all the bosses available along with the Gauntlet, similar to how Dream Team's All Bosses does it. I mean, you're close to beating the game anyway if you beat the gauntlet. Might as well add an extra boss and beat the final bosses too for the All Bosses completion. Only difference between Dream Team and this game's All Bosses is that Dream Team has many glitches, while this game only has one.

Could be good

It looks like Popirea did a run of this category: