
The Blue Green Switch is an e-Reader card designed for use with Super Mario Advance 4: Super Mario Bros. 3. It was part of the Series 2 card collection. While classified as a Power-Up card, it was marked as a "Game Level" card instead. It can only be activated within the main game. After scanning the Blue Green Switch, patches of grass with turnips beneath will appear throughout the main game, allowing Mario to pull them up and toss them at enemies, similar to the gameplay in Super Mario Bros. 2.
| e-Reader / Card-e Reader | TBD |
| Audio | Subtitles | Interface | |
|---|---|---|---|
| English (US) | ✓ | ||
| 日本語 | ✓ |