Wow. Talk about burn in. RHQQ2 I think was the next part. It's been over a decade since I used that code...

UUDDLRLRBASlSt

I have a hunch I’ll somehow remember the Konami Code well after I’ve forgotten everything else.

Not a Game Genie code but I have this catchy thing burned into my wetware:

Down, Up, Square, Triangle, Triangle, O, Down, Up, Square, Triangle

It's for MediEvil (PS1) and 'spells' Dust To Dust, fitting for the game's theme.