Nintendo e-Reader
The Wii U Virtual Console re-release of " features all of the levels from the World-e section of the game unlocked automatically, including levels only released in Japan. This is done by a modified version of the game, where the levels are contained in the game's data and unlocked automatically. In the original game, the levels were unlocked using cards purchasable at various stores, which had dot codes on them containing the level data, and when scanned by the Nintendo e-Reader peripheral, saved the level to the game's save data for later usage without the card. While the original game could only fit 32 levels at any given time, the Virtual Console version has 38 levels in total, which includes every e-Reader card level ever released.