Let's get to the point fast. Here's tl;dr of emulators. Find your GBA emulator for PC, MAC, Android, and IOS. This is just a simple suggestion.
PC:
VisualBoyAdvance or VisualBoyAdvance-M:One of the originals of GBA emulation. VisualBoyAdvance is an open-source emulator that's been developed a very long time ago(2004). After its development stopped, due to its open-source nature many forks have been continued to improve the emulator. VisualBoyAdvance-M is the merger project of such forks. There are several other forks as well, like VBALink and VBA-Next.
Download:
For VBA and VBA-M-> http://www.emulator-zone.com/doc.php/gba/vboyadvance.html (You can find both on this link)
Install and Play
Get the emulator from the provided link. Install it on your PC. Download your ROMs and extract them on your game folder if needed. Set up your controls from Options->Input Open the ROMs from File->OpenGBA
NO$GBA:
Another good emulator for pc you can download and use it for free right away.Official Site: No$GBA
MAC:
OpenEmu:
Official site: https://openemu.org/ (You can download it from this link)mGBA:
Official site: https://mgba.io/downloads.html
Android:
My Boy! - GBA Emulator: https://play.google.com/store/apps/details?id=com.fastemulator.gba&hl=en&gl=USRetroArch: https://play.google.com/store/apps/details?id=com.retroarch&hl=en&gl=US
Pizza Boy GBA Free - GBA Emulator: https://play.google.com/store/apps/details?id=it.dbtecno.pizzaboygba&hl=en&gl=US
IOS:
GBA4iOS: http://www.gba4iosapp.com/
Delta Emulator: https://deltaemulator.com/
Note: These emulators are generally the most popular ones. You can find many paid and free emulators for your device.
Important: None of the ROMs, Hacks, Emulators are hosted on this site. Hacks and Emulators shared giving credits to its original developers. External links and copyrighted content will be removed if requested by their owners.