Hey Gericom, love the work you've done on this! I just ran a few tests with some of my games and thought they might be useful for you to know. If you need more information give me a shout!
Super Mario Advance: SMB2 - No issues
Super Mario Advance 2: SMW - Fails to boot - white screen
Super Mario Advance 3: YI - Fails to boot - white screen
Super Mario Advance 4: SMB3 - Slight GFX errors during stage transition. Slightly longer load times after pipe transitions
Mario & Luigi - Timing for some music channels out of sync. Sprites flicker during intro - causes slowdown. Music corruption during Mario house segment of intro
Mario Kart - Music channels out of sync - Minor GFX error on left side on the horizon of the track - grey line of pixels. Sound corruption during save screen
Sonic Advance - Timing for music channels out of sync. Pitch of some samples incorrect. Background flickers and game slows down during end of act tally
Sonic Advance 2 - Timing for music channels out of sync. Pitch of some samples incorrect
Sonic Advance 3 - Timing for music channels out of sync. Pitch of some samples incorrect. Minor slowdown throughout. Backgrounds flicker
Sonic Battle - Timing for music channels out of sync