NCL has confirmed two new Pokemon titles headed to the Game Boy Advance at some unspecified point in the future -- "Leaf Green" and "Fire Red" respectively. While they are to be all new titles in their own right, each one will have the ability to interact with Pokemon Ruby & Sapphire and the GameCube's upcoming Pokemon Colosseum. It is expected that this new pair will sport highly enhanced visuals over their predecessors.

Source: Nintendo