The Ultra game Boy is approximately the same size as the original Game Boy models, and it features a very similar layout.

Hyperkin

First things first: You need original Game Boy cartridges to play games on the Ultra Game Boy.

The Ultra Game Boy is not like the NES / Super NES Classic Edition, where the games are built into the system digitally. You need to get original carts and, if we're being honest, clean them up a bit.

PRO-TIP: If you get a cotton swab and dip it in alcohol, then carefully clean off the bottom of the cartridge area (allowing a moment for it to dry), that should work. The same solution works for NES, Super NES, N64, and other cartridge-based games. You're welcome!