! Switch

The '''! Switch' was first seen in Super Mario World''. The switches come in four colors, Yellow, Green, Blue and Red. When activated, they make ! Blocks of the corresponding color whole (and, therefore, usable). They have the same purpose in Super Mario 64 and Super Mario World 2: Yoshi's Island.

They are later found in the Paper Mario series. This time, the switches only appear red or blue. Blue switches can only be used once, and normally open passages of some kind. Red switches can be used an unlimited amount of times, and are normally used for moving important object. However, the red ! Switches found in the Palace of Shadow in Paper Mario: The Thousand-Year Door are the only red ! Switches that can only be used once to move a wheel allowing Mario and his friends to get to the Shadow Queen's throne room and crypt.

In Paper Mario: The Thousand-Year Door and Mario & Luigi: Superstar Saga, there are also "simul-switches" (two must be hit at the same time) and "counted switches" (must be hit a certain number of times). There are also black and white ! Switches found in the Great Tree. Mario and company pushed the black switch to reveal four white ! Switches in the room where Mario found the blue key to free the other Punies. Mario had to hit the white ! Switches in this order: sun, moon, Puni and star to retrieve the Super Boots.

In Mario Pinball Land, a Red ! Switch appears in each world. If Mario hits one of these switches hard enough, 8 Red Coins pop out and have been landed in almost every area in the world. Mario has to find 8 Red Coins around the world within the time limit. Hitting the switch is worth 3000 points as it is used. If Mario didn't get all the Red Coins, Mario has another chance to get all the Red Coins. But if Mario gets all the Red Coins on time, Mario obtains the Power Star, if collected; the deactivated switch is changed into a Red ! Block.