Super Mario World: Super Mario Advance 2 Cheats

After filling a ceratin Requirement you give a new look to yoshi's island which is called EXTRA. The shells will look like bubbleheads of Mario, the Pirahnas will have pumpking heads and you can access any stage by pressing SELECT and pressing A on the stage you wish to go to.

For each 150,000 points you get in Mario Brothers, a star will appear at the top of Mario Brothers at the game selection screen (where you pick between Super Mario World and Mario Brothers). You can get up to 5 stars maximum.