The $50 Epilogue GB Operator has a brand-new trick up its sleeve. In addition to backing up Game Boy, Game Boy Color and Game Boy Advance cartridges and saves to a PC, it can now plug into your phone with a brand-new Retrace app for Android and iOS . The idea: check if cartridges are legit, and how much they’re worth, before you buy or sell them. Is it reliable? I plugged around 50 cartridges into the app, and… it could use some work. While most of my English and Japanese library was detected