The E-Card Reader. Many people speculated it would have something to do with Ruby and Sapphire. However the Japanese E-Reader has no link-port so nobody could get what they are bringing now, at the moment, it is just battle cards but people have guessed that there will be cards to bring the unobtainable Pokémon to life but for now there are just Battle Trainer-E Cards.
To Access this Mystery Event you need to have at least 5 Badges. Go into the Pokémon Center in Petalburg City and speak to the Man next to the PC. He asks you for a 4 Word Profile, so say Mystery Event Is Exciting, and it will unlock Mystery Event at the Start Of the Game
Have the GBA linked up to another GBA with the E-Reader in, Scan the Card and then on the GBA with R/S on, go into Mystery Events and you will access the trainer. He/She is found in the South House in Mossdeep City. It can only be a 3 on 3 battle as, according to the Man who's house it is, the house is falling apart. Here are the cards aswell As The Pokémon on it (Again to take up space):
