Integrated GBA - Dolphin Emulator Wiki

Since 5.0-14690, Dolphin has the ability to run its own instances of mGBA directly. These mGBA instances can connect to GameCube games in a deterministic and consistent manner, that allows for full compatibility among GBA <-> GCN connectivity titles. For this feature, Dolphin provides its own mGBA instance directly built in and does not need any external emulator. This feature is currently only supported on Desktop versions of Dolphin.

Integrated GBA - Dolphin Emulator Wiki

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Integrated GBA - Dolphin Emulator Wiki

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Integrated GBA - Dolphin Emulator Wiki

I need emulators for these systems but can't find any good ones for mobile. : r/EmulationOnAndroid