Editing Nintendo e-Reader (section)

===Dot code===
Data is encoded on the cards using "dot code", a specialized [[barcode]] technology licensed from [[Olympus Corporation]]. e-Reader Cards may have one or two sets of dot code on them, either a wide strip on the left side of the card, a wide strip on both the left and right sides of the card, a narrow strip on the bottom of the card or a short strip on the bottom of the card with a long strip on the left side of the card. Smaller games may require scanning only one card (two sets of dot code), while the greater NES games can require as many as five cards (nine to ten sets of dot code) in order to start the application.

The shorter sets of dot code were only used with the [[Pokémon Trading Card Game]]. Cards released in regular sets published by both Nintendo and [[Wizards of the Coast]] had a dot code on the bottom side of the card. When scanned, the e-Reader displayed a [[Pokédex]] data entry for the Pokémon shown on the card. Many of the cards published by Wizards of the Coast included a left side dot code that would allow users to play mini-games, animations, and use secret attacks in the Trading Card Game or play with various songs and graphics.<ref name=tcgTech>{{cite web |url=https://www.pokemonaaah.net/report/carde/ |title=Pokémon TCG Card-E Era |author=nick15 |date=February 17, 2021 |work=Pokémon Aaah! |access-date=June 4, 2024}}</ref><ref name=tcgAttack>{{cite web |url=https://snorlaxative.tripod.com/Snorlaxative!/id19.html |title=Pokemon Card E Reader: Sure to revolutionize the Pokemon TCG for the better! |access-date=June 4, 2024 |author=Snorlaxative}}</ref>