Here is a wall mount for the Gameboy Pocket.
I needed a wall mount for a shadow box project I'm working on and wasn't happy with all the solutions other people have made, so I took the design of the modular gameboy cart holders that I absolutely love and have used before and remodeled it to suit a pocket.
It was also a learning exercise as this is the first model I've ever completed from scratch.
It should be compatible in some form with the game holder, though I haven't tested it as it was never my intention to link them.