Out of all GBA games available, don't choose this one!
However, it's really terrible. The gameplay is horrible - the AI is very cheap, attacks you like insane on any difficulty and the engine is really poor. The uppercuts are very slow. The grappling hook (by Scorpion / Smoke / Human Smoke) sometimes hits the enemy and sometimes doesn't. The fighters' sprites look a little thin, but that isn't such a problem. The main problem about the graphics is that they look blurry and kinda pixelated. The sound? Some samples sound horrible, but not all of them. However, they are messed up. Human Smoke (named "Mystery" in the character select screen) uses one of Sheeva's sounds when he jumps. The announcer uses the "WINS" sample from Mortal Kombat II, not Mortal Kombat 3. There are probably more things to say, but this title is just pure garbage, enough said.