How to Get Into Challenge Mode on the "New Super Mario Bros" for Wii
- 1). Clear all eight worlds in the game, beating the bosses in each world. Beating Bowser at the end of the game will unlock the ninth world.
- 2). Collect all of the star coins in each world; there are three star coins, some in hidden locations, in each level. For every world you collect all the star coins in, a new level will be opened in World 9. For example, collecting all the star coins in World 1 will open Level 9-1.
- 3). Play through all eight levels in World 9 to defeat the game's "Challenge Mode."