Nintendo GameCube Game Boy Advance Cable

The Nintendo GameCube Game Boy Advance Cable is an Nintendo GameCube accessory allowing for the Game Boy Advance to connect to it as a controller. The Fusion Suit and the first Metroid game can be unlocked in Metroid Prime by connecting to Metroid Fusion with this link and completing either game or both of them. Samus's Varia Suit can also be downloaded from an e-Reader card to Animal Crossing using the Nintendo GameCube Game Boy Advance Cable.

Metroid Prime originally had Super Metroid as its unlockable game, which was implemented by David Kirsch, but Nintendo ordered it to be removed because it was implemented using a third-party emulator. The connectivity feature in Metroid Prime was programmed by Hideaki Shimizu and Tomohiro Kawase.

Metroid Prime 2: Echoes and Metroid: Zero Mission were originally intended to be able to connect to one another, as with their predecessors, but both time constraints and the fact that their release dates were far apart prevented this feature's implementation. Metroid: Zero Mission, however, is able to connect to Metroid Fusion via a standard Game Boy Advance Game Link Cable. Another factor was the lack of players who possessed connecting cables.