Pokemon Emerald Version - Game Boy Advance Players must keep balance in the world of Hoenn, where Team Magma or Team Aqua are taking over Use your best battle strategies - on the Battle Frontier you'll face the most challenging competition ever 7 Frontier Brain competitors - beat them to gain all the symbols of the Battle Frontier Connects with Pokemon Ruby, Sapphire, Colosseum, Fire Red and Leaf Green for total compatibility Wireless multiplayer trading and battling with up to 4 players