What is a Nintendo e reader?
The Nintendo E-Reader was a peripheral for the Game Boy Advance
that allowed cards to be swiped through to read data. The cards
could hold games (i.e. Donkey Kong) or other information (i.e.
unlockables for games such as Animal Crossing). The E-Reader cards
were standard playing/trading-card size, and the data was held on a
pattern of small dots on the bottom of the card. Due to its
bulkiness and the limited amount of data one card could hold,
Nintendo silently let the E-Reader die.