Red Switch Palace
The Red Switch Palace is the third switch palace Mario or Luigi encounters hidden in Vanilla Dome during the events of Super Mario World and its remakes.
The first room has eight Koopa Troopas separated by a Used Block with one Koopa in a spinning shell, a P-Switch, and Coins above the Koopas. Mario or Luigi will hit the P-Switch located near them and run to the coins above the Koopas (which have changed to Used Blocks) and the spinning Koopa will chase Mario or Luigi below but it will kill the Koopas it passes, and when all Koopas are hit the player will be rewarded with a 1-up.
In Super Mario 64, Mario must go to the entrance of the castle and stand directly on-top of the sun (NOTE: This trick only works if the sun is shining onto the sun). Once on-top of the sun, the player should press the c-stick forward, changing Mario's view of things. Once this is accomplished, use the joystick to make Mario look at the source of the light. When in the stage, Mario will be flying. Once over the top of the platform, press Z and Mario will land. On the ground, ground-pound the red switch, thus making the red ! block appear.