Infinite star bits and 1 ups
First, you need to have defeated the final bowser. When you have, you are allowed to switch between mario and luigi on the faceship. Get all starbits possible on the ship, such as: the 6 starbits around the luma, and the island of yoshi fruits, and also, go to the starshroom. There will be a 1 up. Then change into luigi. Everyting will be in back in place, such as the starbits and the 1 up mushroom. Take the starbits, 1 up mushroom and then change back to mario. Repeat for infinite starbits and 1 ups. Hope this helps!
P.S sorry for the long cheat
Added by: Guest Aug 23rd 2011, ID#4671