mGBA is a Game Boy Advance emulator written in C. The project started in April 2013 with the goal of being fast enough to run on lower end hardware than other emulators support, without sacrificing accuracy or portability. Even in the initial version, games generally play without problems. It is loosely based on the previous GBA.js emulator, although very little of GBA.js can still be seen in mGBA.

Changes:

Bugfixes:
* All: Fix fullscreen config option being ignored
* ARM7: PSR mode bits should not get sign extended
* GB: Fix audio not being deinitialized
* GB: Fix crash when masking savedata
* GB: Properly initialize sramRealVf variable
* GB Audio: Fix serialization of channel 3 and NR52 properties
* GB Audio: Reset envelope timer when reseting sound channel
* GB MBC: Fix SRAM dangling pointer with RTC games
* GB MBC: Fix initializing MBC when no ROM is loaded
* GB Memory: Fix patching ROM bank 0
* GB Memory: Fix starting HDMAs during mode 0
* GB Memory: Fix HDMA5 value after DMA completes
* GB Video: Initialize LCDC in renderer
* GB Video: Hblank IRQs should mask LYC=LY IRQs
* GBA: Fix IRQs firing after already being cleared
* GBA: Only unhalt CPU if appropriate bit is set in IE
* GBA: Add savegame override for Crash Bandicoot 2
* GBA BIOS: Fix MidiKey2Freq BIOS reads
* GBA BIOS: Fix invalid CpuSet not setting BIOS prefetch
* GBA Cheats: Fix GameShark ROM patches
* GBA I/O: Mask off WAITCNT bits that cannot be written
* GBA Memory: Fix misaligned BIOS reads
* GBA Memory: Fix VCOUNT being writable
* GBA Video: Fix out of bounds sprite transforms
* Libretro: Fix unterminated SET_INPUT_DESCRIPTORS
* Libretro: Fix disabling BIOS
* Libretro: Fix Game Boy savestates and audio
* Qt: Fix changing resolution of software renderer
* Qt: Fix setting overrides
* Qt: Fix cut off tiles and alignment issues in tile viewer
* Qt: Only reset window dimensions when first shown
* Qt: Fix Qt Multimedia audio driver on big endian
* Qt: Fix Apply button for key and controller configurations
* VFS: Fix resizing memory chunks when not needed
* Windows: Fix Unicode directory handling

Misc:

* GB, GBA: Prevent loading null ROMs
* GB Audio: Initialize wave RAM to GBC values
* GB Memory: Reset ROM bank when loading a ROM
* PSP2: Improved controller rumble

https://mgba.io/

Visual Boy Advance GX is a Game Boy Advance / Game Boy emulator based on VBA-M.

Features:

* Wiimote, Nunchuk, Classic, and Gamecube controller support
* Rotation sensors, Solar sensors, and Rumble support
* Optional special Wii controls built-in for some games
* Editable 14-colour palettes for monochrome Gameboy games
* SRAM and State saving
* IPS/UPS patch support
* Custom controller configurations
* SD, USB, DVD, SMB, Zip, and 7z support
* Compatiblity based on VBA-M r927
* MEM2 ROM Storage for fast access
* Auto frame skip for those core heavy games
* Turbo speed, video zooming, widescreen, and unfiltered video options

Changes:

* Restored Wiiflow mode plugin by fix94
* Restored fix filebrowser window overlapping
* Change all files End Of Line to windows mode
* Remove update check for updates

Plenty of legal GBA homebrew games to try out can be found here at PDRoms -> http://www.pdroms.de/files/gameboyadvance/

http://code.google.com/p/vba-wii/

FCE Ultra GX is an NES emulator based on FCEUX. With it you can play NES games on your Wii/GameCube. The GUI is powered by libwiigui.

Features:

* Wiimote, Nunchuk, Classic, and Gamecube controller support
* iNES, FDS, VS, UNIF, and NSF ROM support
* 1-4 Player Support
* Zapper support
* Auto Load/Save Game States and RAM
* Custom controller configurations
* SD, USB, DVD, SMB, Zip, and 7z support
* Custom controller configurations
* 16:9 widescreen support
* Original/filtered/unfiltered video modes
* Turbo Mode – up to 2x the normal speed
* Cheat support (.CHT files and Game Genie)
* Famicom 3D System support
* IPS/UPS automatic patching support
* NES Compatibility Based on FCEUX 2.2.0+ (r2818)
* Open Source!

Changes:

* Hide saving dialog that pops up briefly when returning from a game
* Don’t ignore buttons when zapper is enabled. prevented “Gotcha! The Sport!” from working (thanks liuhb86!)

Free and legal NES roms to try with this emulator can be downloaded from here.

http://code.google.com/p/fceugc/

Visual Boy Advance is a Game Boy / Game Boy Advance Emulator for Wii / GameCube, based on VBA-M. The code is a continuation of Softdev and emu_kidid’s efforts, and uses libogc and devkitppc. The GUI is powered by libwiigui.

Features:

Wiimote, Nunchuk, Classic, and Gamecube controller support
SRAM and State saving
IPS/UPS/PPF patch support
Custom controller configurations
SD, USB, DVD, SMB, Zip, and 7z support
Compatibility based on VBA-M r927
MEM2 ROM Storage for fast access
Auto frame skip for those core heavy games
Turbo speed, video zooming, widescreen, and unfiltered video options

Changes:

* Hide saving dialog that pops up briefly when returning from a game

http://wiibrew.org/wiki/Visual_Boy_Advance_GX

WoxelCraft by DaeFennek is a 3D Voxel Engine and a basic clone of Minecraft for the Nintendo Wii.

Changes:

* Noise Terrain Generator
* Nunchuk Support

http://wiibrew.org/wiki/WoxelCraft

mGBA is a Game Boy Advance emulator written in C. The project started in April 2013 with the goal of being fast enough to run on lower end hardware than other emulators support, without sacrificing accuracy or portability. Even in the initial version, games generally play without problems. It is loosely based on the previous GBA.js emulator, although very little of GBA.js can still be seen in mGBA.

Changes:

– Core: Fix importing save games as read-only
– FFmpeg: Fix encoding AAC
– GB: Fix invalid STOP behavior on Game Boy Color
– GB: Initialize audio properly
– GB: Properly clear KEY1 bit 0 when switching speeds
– GB: Properly unload save files when unloading a ROM
– GB, GBA: Fix emulator hardlocking when halting with IRQs off
– GB MBC: Fix MBC7 when size is incorrectly specified
– GB MBC: Fix RTC access when no save file is loaded
– GB SIO: Don’t auto-clock external shift clock
– GB Video: Setting LYC=LY during mode 2 should trigger an IRQ
– GB Video: Fix video frames getting missed when LCDC is off
– GB Video: Clear screen when LCDC is off
– GBA Cheats: Fix holding onto pointers that may get invalidated
– GBA Cheats: Fix key-activated CodeBreaker cheats
– GBA Cheats: Fix uninitialized memory getting freed when saving
– GBA Hardware: Improve Game Boy Player rumble behavior
– GBA Memory: Fix several unused I/O register read values
– GBA Savedata: Fix loading savestates with 512Mb Flash saves
– LR35902: Fix events running with the wrong cycle active
– Qt: Fix “close” button on Overrides view
– Qt: Fix saving overrides
– Qt: Fix directory set unloading when replacing the ROM
– Qt: Fix patch loading
– Qt: Fix crash when saving an override if a game isn’t loaded
– Qt: Fix showing default display driver as OpenGL (force 1.x)
– SDL: Attach rumble in SDL frontend
– Util: Fix PNG identification on files too small to be a PNG

Misc:
– All: Only update version info if needed
– All: Split out install locations for Libretro and OpenEmu
– FFmpeg: Encoding cleanup
– GB: Reset active region when reloading ROM
– GB Memory: Initialize RAM pattern for GBC
– GB Video: Improved video timings
– Qt: Manage window sizes slightly better
– Qt: Remember scale option independent of core dimensions

https://mgba.io/

WoxelCraft by DaeFennek is a 3D Voxel Engine and a basic clone of Minecraft for the Nintendo Wii.

http://wiibrew.org/wiki/WoxelCraft

EasyRPG Player is an open source implementation of the RPG Maker 2000/2003 engine. Get a RPG Maker 2000/2003 game and place the Player (boot.dol) in the root directory of the game (that’s where RPG_RT.exe is). The program has no file browser, each game really needs its own boot.dol!

Changes:

It took a long time but we finally reached a new milestone 0.5 with codename “Potion” and we promise you: The waiting time was totally worth it. Initially we planned to do a 0.4.2 release in-between, but we were busy adding too many new cool features. Therefore we wanted to integrate them properly before doing another release. If you can’t wait go directly to our download section.

Two of the bigger achievements in this milestone are a completely new audio interface and huge performance improvements. These changes had the biggest impact on the Wii version, for the first time you can experience completely working audio and a constant frame rate (in most situations). EasyRPG Player runs now as homebrew on the Nintendo 3DS and the PlayStation Vita, raising our supported system count to nine! Another long awaited addition is the new user interface for the Android version, which should finally run properly on Android 6.0 and features a beautiful game browser.

Alongside these additional features we fixed tons of interpreter problems, improved the accuracy of both map and battle interpreter, which are now very close to RPG_RT, and implemented many missing battle commands. When your game did not run in 0.4.1: It should run now, otherwise please file a bug ;).

https://www.easy-rpg.org/player-downloads.html

Genesis Plus is a Sega Genesis / Sega Megadrive / Sega Master System emulator for Wii and GameCube. Additionally a very simple SDL port for Win32 is available too. This is a port of Charles MacDonald’s Genesis Plus, with plenty of improvements.

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https://bitbucket.org/eke/genesis-plus-gx/src/master/builds/

SNES9x GX is Super Nintendo Entertainment System / Super Famicom emulator based on SNES9x, ported to the Wii. The GUI is powered by libwiigui. SNES9x GX MOD is a modification of the official SNES9x GX by Zopenko.

http://gbatemp.net/threads/snes9xgx-mod-preview-wiiupro-screenshot-button.389448/page-17#post-6663972