I downloaded Gameshark version 6.0.3 for MC version 1.12.2 (forge 184.108.40.20638) and am currently playing single player. Pixelmon works fine but when I go to my mods the Gameshark is disabled and enabling cheats doesn't help. The "Unavailable" blip doesn't even appear on the screen.
"I receive a "you do not have permission to use this command" error message when typing a prompt with the Gameshark.
Do I still need to download something else? I feel like I'm missing something.