When comparing John GBC vs My OldBoy!, the Slant community recommends John GBC for most people. In the question“What are the best Gameboy Color emulators for Android?” John GBC is ranked 1st while My OldBoy! is ranked 3rd. The most important reason people chose John GBC is:
Wiimotes, bluetooth HID controllers and MOGA controllers all work with this emulator, which is a great feature to have when so many games really require the precise input that a controller offers.
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Pros
Pro Wide range of controller support
Wiimotes, bluetooth HID controllers and MOGA controllers all work with this emulator, which is a great feature to have when so many games really require the precise input that a controller offers.
Pro Zero advertisements and no need for an internet connection
There are no advertisements in the app taking up precious screen space and there is no need for an internet connection to use the app.
Pro Supports game cheats
Game Genie, Game Shark and PAR cheat codes work with this emulator and it's library of supported games. Which can be good for users that want things like unlimited lives or infinite in game money.
Pro Fast forward and slow down functions
The fast forward and slow down function allows users to easily speed up cutscenes and slow going portions of the game as well as slow down sections that users would like to view longer.
Pro Emulated link Cable support
My OldBoy! supports Link Cable emulation to itself and to other devices, which is great for trading Pokemon or playing multiplayer games like Mario Golf.
Pro Video filters for creating custom looking games
My OldBoy! supports video filters through the use of GLSL shaders.
Pro HID controller support
My OldBoy! supports bluetooth controllers through HID Android support.
Pro Supports cheat codes
My OldBoy! supports cheat codes for Game Genie and Game Shark which allow the user to change aspects of the game such as adding infinite lives.
Pro Tilt sensor and rumble emulation
For the few Gameboy games that have rumble or tilt support My OldBoy! will emulate those features through the devices hardware.
Cons
Con Unable to view current memory usage
Viewing memory usage can be helpful in Pokemon games as the Pokemon with higher IVs use more memory. It is basically an easy way to get good Pokemon. Sadly this emulator does not support such a feature.
Con Link Cable support is buggy and often does not work
Many users have complained of buggy or non working Link Cable support. Hopefully this will be fixed in a future update.