Only emulate games you legally own. You should dump your own GBA cartridge ROM (Read-Only Memory) to your PC, then transfer it to your phone.
: Use a Bluetooth Controller for the most authentic and precise feel. Quick Gameplay Tips Sonic Advance 2 Android Port
Navigate to your ROM folder. Select Sonic Advance 2 . Only emulate games you legally own
Standard GBA emulation gives you a tiny rectangle with black bars on the sides of your modern phone. However, community coders have created widescreen memory patches for Sonic Advance 2 . Sonic Advance 2 Android Port