Are you talking about an emulator that emulates a rom on your GBA, or the officially sold game Sonic Genesis GBA?
Current Championships: Sonic 3, Sonic & Knuckles
Former Championships: Sonic Lost World 3DS, Sonic 1 2013, Sonic 2 2013, Sonic 1 GBA, Sonic Generations, Sonic Pocket Adventure
<CodeGirl> [-New Record-] Zeupar got 1:21:25 on SAdva / Times / Egg Rocket 1 (Tails)
<SonicBoom737> I hate you Zeupar
<Zeupar> I love you SonicBoom737, though <3