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

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 much more easily.

Super Mario Bros. 3
Protagonists	Mario • Luigi • Princess Toadstool • Toad • Mushroom Kings
Bosses	Boom Boom • Koopalings (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 • Lakitu's Cloud / Jugem's Cloud • Goomba's Shoe / Kuribo's Shoe • Music Box • Hammer • ? Ball • Anchor • Boomerang* • Cape Feather* • Roulette Box • P-Switch • Silver Coin • Warp Whistle
Switches*	Yellow Switch • Green Switch • Red Switch • Blue Switch • Blue Green Switch • Cyan Switch • Orange Switch
Worlds	Grass Land • Desert Hill / Desert Land • Sea Side / Ocean Side / Water Land • Big Island / Giant Land • The Sky / Sky Land • Iced Land / Ice Land • Pipe Maze / Pipe Land • Bowser's Castle / Castle of Koopa / Dark Land • Warp Zone • World-e*
Enemies	Angry Sun • Baby Bloober • Baby Cheep • Big Bertha • Bloober Nanny • Bloober • Bob-omb • Boo Diddley • Boomerang Bro. • Boss Bass • Bullet Bill • Buster Beetle • Buzzy Beetle • Cannonball • Chain Chomp • Cheep-Cheep • Colossal Koopa Paratroopa • Dry Bones • Fire Bro. • Fire Chomp • Fire Snake • Gargantua Koopa Troopa • Giant Cannonball • Goomba • Grand 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 • Piranhacus Giganticus • Podoboo • Ptooie • Red Paragoomba • Rocket Engine • Rocky Wrench • Roto-Disc • Sledge Bro. • Spike • Spiny Cheep-Cheep • Spiny • Spiny Egg • Stretch • Thwomp • Tweester • Venus Fire Trap
* - Super Mario Advance 4-exclusive