How do you get a gba emulator on nook tablet?

To get a GBA emulator on a Nook Tablet, you'll need to root the device first, as it doesn't support third-party apps natively. After rooting, you can install an Android emulator like My Boy! or GBA.emu from the google Play Store. Once installed, you can load GBA ROMs onto the device to play your games. Make sure to follow any legal guidelines regarding ROM usage.