I tried that....but when I go to another world and refill, then go back, my status is back to the same as it was before. For example, I get to 14-2 and i have half my health bar, no light magic and almost all my shadow magic. I leave and go to another stage and fill up, then go back but my status is the same. Do I need to finish stage 5-2 and let it save?
Well I finally got it to save but it doesn't matter, this boss is one of the most frustrating, annoying, and unbalanced bosses I've ever fought. I doubt I'll ever even beat him, and I'm not sure I even care to keep trying. Horrible DLC.