GBA games

does any one know of any really good gba games

Advance Wars and platform games like crash bandicoot fusion.

To mention (U) & (E) released games, in no particular order:

Castlevania - Aria of Sorrow
Castlevania - Circle of the Moon
Castlevania - Harmony of Dissonance
Legend of Zelda - A Link To The Past Four Swords
Legend of Zelda - The Minish Cup
Super Mario Advance 1-4
Mario Golf - Advance Tour
Mario Kart
Golden Sun 1 & 2
Tactics Ogre - The Night of Lodis
Boktai 1 & 2
Klonoa - Empire of Dreams
Final Fantasy Tactics Advance
Final Fight One
Final Fantasy I & II
Megaman Zero 1 - 4
Fire Emblem
Fire Emblem - The Sacred Stones
Klonoa Empire of Dreams
Lunar Legend
Metroid - Zero Mission
Metroid Fusion
Metal Slug Advance
...
and the next Metal Slug

yeah those are al really good games also try
kingdon hearts chain of memories
sword of mana
and shaman king

avoid medal of honor underground because the graphics on it are S**t

Golden Sun