Challenge%

Challenge% is an interesting category that blends low% with 100% in a single run. The first half of the run is just like a regular low% run where you complete the game up to the final boss with the bare minimum 9% items: Morph, Bombs, Ice Beam, Power Grip, Varia, Gravity, Space Jump, Plasma Beam, and a single Missile Pack. The first obtainable power bomb pack is at the very end of the game and you grab that as your 10th item, and from that point you turn around an finish grabbing 100% of the items in one big cleanup route before returning to finish off Mecha Ridley and end the game.