During the Credits
The credits of New Super Mario Bros. Wii allow all four players to run around and break the names shown, just like the brick coin blocks in the game. There’s more to just breaking the name blocks during the credits, as it is also a mini game with certain blocks having coins come out of them which are rewarded to the player that breaks them. Players can compete against each other to see who can break the most blocks, obtain the most coins and get the highest score.
After the Credits
There is an extra scene with all of Bowser’s children struggling to carry him back to the castle. The scene ends with the castle about to fall over on top of them. There is also a secret 9th world unlocked after the credits and completion of the game.