Over at GBA Dev a new release of mGBA has been released, mGBA is a GBA Emulator for Windows, 3DS, Wii, PSVita, heres some of the news:

mGBA is a new emulator for running Game Boy Advance games. It aims to be faster and more accurate than many existing Game Boy Advance emulators, as well as adding features that other emulators lack.

Up-to-date news and downloads can be found at mgba.io.

A new release of mGBA, version 0.5.2, is available. This version is a bugfix release, which contains many stability and accuracy fixes. An extensive list of changes follows after the cut.

Game Boy support
Support for encrypted CodeBreaker GBA cheats
Emulation of Vast Fame protected GBA carts (taizou)
Tile viewer
Threaded rendering mode
Libretro: Memory map and achievement support (leiradel)
GUI: Add UI control remapping
GUI: Add fast-forward
Wii: 240p support
3DS: Adjustable screen darkening
Ability to temporarily load a savegame
Load specific files out of archives
Automatic BIOS detection

Supported Platforms:
Windows Vista or newer
OS X 10.7 (Lion)[3] or newer
Nintendo 3DS
PlayStation Vita

Download Here --> https://mgba.io/