Here are the games that are available for the GBA,SNES and Megadrive.

GBA list:

Golden Sun-RPG.
Golden Sun The lost age-RPG.
Yu-Gi-Oh Dungeon Dice monsters-Board game.
Dragonball Legacy of goku 2-RPG.
Yu-Gi-Oh World wide edition-Card game.
Yu-Gi-Oh Eternal Duelist Soul-Card game.

SNES:

Chrono Trigger-RPG
Final fantasy 5-RPG
Battle Toads Double Dragon-
Fifa 98-Football (Soccor)
Fzero 2-Racing
Kirby's Avalanche-Miscellaneous,Puzzles
lord of the rings-Action RPG
Megaman 7-2D action,Platformer
Metal marines-Stratagy,Breeding,constructing
Parodius Da!-Action Shooter,Scrolling
Prince of persia-Action
Ren and Stimpy-Action
Rtype 3-Action,Shooter,scrolling
Shadowrun-RPG
Simcity 2000-Stratagy,City building,Modern
Star trek fleet acadamy-Sci fi,Simulation,Large spaceship
Star Wars empire strikes back-Action,platformer
Terranigma-Action RPG
Ultima 6-RPG
Worms-Stratagy
Warlock-Action
Uniracers-Driving,Racing,Arcade
Undercover cops-Action

Megadrive:

Uh I just found out that I can't give any lol :P

Well there you go.Soon there will be games for the Megadrive :D