! Switches are items that appear in New Super Mario Bros. Wii. They are red switches that have a white exclamation point on them. It first appears on World 3's map. It is, at first, inaccessible until Mario completes World 3-4 (the secret exit), and World 3-5 (the secret exit). Then, a path is made towards it. Mario can then move himself toward the switch and automatically hit it. This causes all the invisible Dotted Line Blocks to turn into Red Switch Blocks, which gives access to the World 3-4's main Flagpole. Hitting the ! Switch is required to complete World 3. ! Switches also appear during Bowser's final battle.