After you get the 6th Crystal star, you will be able to make a comeback in the Glitz Pit! However, Jolene accidently destroys your file so you have to start at rank 20 again! It's really quite easy to climb the ranks because you have all those powerful new moves! Anyway, when you get to Rank 1 and challenge Rawk Hawk for the championship, equip your 'Hammer Throw' badge. That way, when Rawk Hawk hangs from the ceiling and makes all the stuff fall down, you can use your Hammer Throw to kill him (If Hammer Throw is not equipped, you can't attack him.)