Hard4Games, a Youtube channel dedicated to video games, has discovered a prototype for a mysterious and unknown game developed for Game Boy Advance.

The game, which does not formally have a name, appears to be an RPG and has some connection to the Devil Children/Demi Kids games. It also has a “totally new environment and art style”. Up till now, no one has figured what this game is yet.

See it for yourself below:

We uncover a mystery Game Boy Advance prototype. The game is clearly an RPG and related to the Devil Children/Demi Kids games, but with a totally new environment and art style. Can you help us determine what this is?

Thanks, PushDustIn.