Blue Switch (card)

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The Blue Switch card that triples the effect of 1-Up Mushrooms.

The Blue Switch is an e-Reader card for use with Super Mario Advance 4: Super Mario Bros. 3. It is only available in Japan.

Once it is scanned, all of the 1-Up Mushrooms in the game become 3-Up Moons. This feature allows Mario and Luigi to accumulate extra lives more easily.