1UP Kinoko ga 3UP Moon ni kawaru!
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The title of this article is official, but it comes from a non-English source.
If an acceptable English name is found, then the article should be moved to the new title.
The Blue Switch is a Japan-exclusive e-Reader card for use with Super Mario Advance 4: Super Mario Bros. 3. It was released in Series 1 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.
Flavor Text
Japanese
1UPキノコが3UPムーンに変わる!
Translation
1UP mushrooms turn into 3up moon!