I dont play any sport games, so sorry.
1. Golden Sun & Golden Sun - The Lost Age
THE best RPG series for GBA, with excellent graphics, music, story and gameplay.
2. Fire Emblem & Fire Emblem - The Sacred Stones
A series of really good strategy & tactics games set in a fantasy world. Excellent graphics and gameplay.
3. Advance Wars & Advance Wars - Black Hole Rising
If Golden Sun defines RPG games in GBA, Advance Wars is for strategy. Unarguably the best strategy game ever.
4. Breath of Fire 1 & 2
Two really good games, which started the entire RPG series of BOF, now its like 6 or 7 games, I think. They were originally on SNES, so the graphics are not upto the GBA standards.
5. Contra Advance - The Alien Wars EX
The gloriousness of another Contra game - no words, no words.
6. Crash Bandicoot (5 games totally)
A series of adventure game like Mario, highly enjoyable, with an OK story.
7. CT Special Forces (4 games totally)
A military action series, spanning various genres like arcade shooter to plane shooting sction. Very nice and clean graphics
8. DragonBall (8 games totally)
I dont follow the DBZ series, so I cant really understand the games, except the graphics are really good.
9. Final Fantasy Advance
All the good old FF games on NES and SNES with improved graphics, music and gameplay. A must play.
10. Final Fantasy Tactics Advance
A completely new game, following FF Tactics on Playstation, with awesome music, graphics and story in a fantasy world.
More to come later...