The Cyan Switch is an e-Reader card for use with Super Mario Advance 4: Super Mario Bros. 3
File:Cyan switch card.PNG
The card used to activate the switch.
. It was only available in Japan, so only Japanese players will be able to obtain it.
Once scanned, the P-Meter is halved, making it much easier to run and fly throughout stages. This opens up many new areas you can use to fly across the stage.