Super Mario series (i.e. Super Mario Advance 1, 2, 3 & 4)
Advance Wars
Bomberman Max 2
Broken Sword The Shadow of the Templars
Crash Bandicoot XS
Crash Bandicoot 2: N-Tranced
Castlevania - Harmony of Dissonance
Donkey Kong Country
Doom
Doom II
Duke Nukem Advance
Earthworm Jim 2
GT Advance 2: Rally Racing
Mario Kart Super Circuit
Metroid Fusion
Rayman 3 Hoodlum Havoc
Rayman Advance
Sonic Advance
Sega Smash Pack
Sonic Advance 2
Street Fighter Alpha 3
The Legend of Zelda: A Link to the Past/Four Sword
Tetris Worlds
V-Rally 3
Warioland 4
Worms World Party
Worms Blast
Yoshi's Island: Super Mario Advance 3
Sonic advance 2 takes way longer to complete than sonic advance 1.
Most of the levels are simple for most of the time. The later bosses are of intermediate difficulty, and it took me ages to work out how to beat lv5 for sonic. I've completed it now once with each charecter, but I'm still stuck on the chaos emeralds. Finding all of the special rings is challenging enough, but then the special stages are really quite difficult (for me at least). I've still yet to get even ONE chaos emerald