I think it means enemy reader like a trainer that wants to battle you
You will have to trade it from other pokemon.
You have to have an e-reader. the e-reader game is behind them.
The E-Reader is a game boy advance item that you cant get in the game because its outside of the game. You plug it to the back of your GBA
It must be scanned in through an E-reader then given as a mystery gift.
There is an old lady's house in Pokemon FireRed that has some boxes you can get past. The only way to get past them is to use the E reader hardware device.
E reader is a device you can buy its not in the game.
As of 2014, there is not a listed e-reader code for Pokemon Ruby. There are codes however for other Pokemon versions.
The area behind the boxes on Seven Island in Pokemon FireRed cannot be accessed. It was an area created for the E-Reader. However the function was taken out when the cards were not planned to be released outside of Japan.
Altering cave is a special dungeon that ordinarly houses an infinite amount of Zubat however this can be changed using the special E Reader device and the proper E Reader pokemon cards will modify pokemon into the dungeon therefore instead of finding Zubat you can find Smeargle for example and so on.
You can't do anything with altering cave unless you have an E Reader.
you have to have a gameshark or action reader or an e-reader to scan it on
E-reader.