From WikiTemp, the GBAtemp wiki
Legend Class
Playable; The Game works perfect without any noticeable errors.

It works exactly like when you play it on real GBA Hardware.

ct-works
Minor Playable Issues; The Game has some small issues like small flickering, frame drops or glitching graphics.

But the Game itself works fine and you are able to complete the Game successfully without any huge disadvantages for your in-game-progress.

ct-minor
Major Playable Issues; The Game has several stronger issues like stronger flickering, massive frame drops and not only the graphics are glitching, but the Game itself too.

It works, but it will be a pain for both of your Gaming experience, as probably for your Wii itself.

ct-issues
Unplayable; The Game crashes after some in-game-progress (randomly), you can't change Discs when prompted, the screen keeps black or you can't even start the Game at all.

You can't complete the Game successfully to the end even when both the Graphics and Framerates working fine and/or the Wii will freeze/shutdown by itself.

ct-broken

Game list

ROM Title Status Version Notes Crash Reason Notes
Classic NES Series - Super Mario Bros. (U) Unplayable  ??? Game Pack Error. Needs EEPROM Support Requires S-RAM Patch. Impossibly some reason as of Gbaemu4DS Version.
Driver 2-3 Advance (U) Minor Playable Issues  ??? slow
Super Mario Advance - Super Mario Bros. 2 (U) Playable  ???
Super Mario Advance - Super Mario Bros. 2 (E) Major Playable Issues  ??? Runs slow
Super Mario Advance 2 - Super Mario World (U) Playable  ???
Super Mario Advance 3 - Yoshi's Island (U) Playable  ???
Super Mario Advance 4 - Super Mario Bros. 3 (U) Minor Playable Issues  ??? Requires SRAM Patched. Needs Flash Save Emulation. Shows "Your saved data is corrupted" Error Message on boot and crash. Impossibly some reason as of the CitrAGB Version..