I want to do a super mario galaxy any% luigi run and I don't want to do a 120 star Mario run every time I want to reset for any% Luigi or 120 star Luigi. Can you please help me?

You can keep a Mario 120 star file in one of the 6 slots, so you can load it and play as Luigi. You can even copy it to a different slot before starting a run so you can save and still have a clean Luigi file for next time

Okay thanks! I will start running any% luigi so be prepared for my name on the leaderboard lol.