Very nice SouLLy. I did a few gb cases/covers for a different kinda case but asked my lawyer about using the Game boy font & nintendo logo and he said "
Unlicensed use of trademarks in a commercial manner like that would set you up for trademark infringement claims.
But you can factually say that the game is made for the Game Boy. That's called nominative use.
Using logos is risky, though. As is using trademarks in any way that makes your game look like it's licensed by Nintendo.
Dunno if its different in uk though, everything else is amazing. this is weasel btw