Blue Switch (Super Mario Advance 4: Super Mario Bros. 3)

The blue switch that triples 1-Up Mushrooms.

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

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

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Super Mario Bros. 3
Protagonists	Mario • Luigi • Princess Toadstool • Toad • Mushroom Kings
Bosses	Boom Boom • Larry Koopa • Morton Koopa Jr. • Wendy O. Koopa • Iggy Koopa • Roy Koopa • Lemmy Koopa • Ludwig Von Koopa • Bowser
Items	Super Mushroom • Fire Flower • Super Leaf • Star • 1-Up Mushroom • Frog Suit • Hammer Suit • Coin • Tanooki Suit • P-Wing • Goomba's Shoe • Music Box • Boomerang* • Cape Feather*
Switches*	Yellow Switch • Green Switch • Red Switch • Blue Switch • Blue Green Switch • Cyan Switch • Orange Switch
Worlds	Grass Land • Desert Land • Water Land • Giant Land • Sky Land • Ice Land • Pipe Land • Dark Land • Warp Zone • World-e*
Enemies	Angry Sun • Baby Blooper • Baby Cheep • Big Bertha • Blooper Nanny • Blooper • Bob-omb • Boo • Boomerang Bro. • Boss Bass • Bullet Bill • Buster Beetle • Buzzy Beetle • Cannonball • Chain Chomp • Cheep Cheep • Dry Bones • Fire Bro. • Fire Chomp • Fire Snake • Goomba • Hammer Bro. • Hot Foot • Jelectro • Koopa Paratroopa • Koopa Troopa • Lakitu • Lava Lotus • Micro-Goomba • Missile Bill • Muncher • Nipper Plant • Para-Beetle • Paragoomba • Pile Driver Micro-Goomba • Piranha Plant • Podoboo • Ptooie • Rocky Wrench • Roto-Disc • Sledge Bro. • Spike • Spiny Cheep-Cheep • Spiny • Stretch • Thwomp • Venus Fire Trap
* Appears only in Super Mario Advance 4