Changes

* '''Linked to a GBA game:''' This is how the e-Reader was used so that content scanned from e-Cards is used to unlock flags for data on the cartridge (or even add new data not in the cartridge, usually stored to the save data file for that game - like Pokémon Gen 3 guest trainer data, F-Zero Climax developer ghost data, or SMA4 e-World level data) new content in retail GBA games like Super Mario Advance 4 and Rockman Zero 3 among many others. Requires two GBA units - one with the game cartridge, the other with the e-Reader device, connected with a Link Cable, with the gray end on the second GBA. Sadly many of these features were made inaccessible without cheats, or deleted altogether, in Western localizations because of the device's unpopularity outside Japan.

==Emulators==