I made a code for New Super Mario Bros. Wii that completely removes boundaries inside levels, and allows you to break any tile in your way, giving you the ability to freely roam the level as if every sub area is included inside one big area!!

In the video I am Yellow Toad,
Mario is ‪@TCAtrevor‬,
Blue Toad is ‪@Ardenzard‬,
Luigi is ‪@IPikeLancakes‬

Check the pinned comment for info on how you can play yourself