Gray P Switch

Gray P Switches (or Gray P-Switches ) are objects in Super Mario World and Super Mario World: Super Mario Advance 2. They appear identical to normal Switch Blocks except that they are gray with a pink rim as opposed to blue with an orange rim. When pressed, they turn all enemies that are onscreen into Gray Coins.

As revealed by hacking, Gray P Switches also possess the ability to transform Munchers into ordinary coins for the duration of their effect, similar to regular Switch Blocks in Super Mario Bros. 3. However, as Gray P Switches never appear in the same levels as Munchers in Super Mario World, this functionality cannot be seen in game.

Gray P Switches are also unused in Super Mario Advance 4: Super Mario Bros. 3, where they would act as they originally did.

Trivia

 * In Super Mario Bros. 3 for the NES, Switch Blocks appear in a gray palette in the fortress levels, predating the Gray P Switches.