FUTURA, I think I understand what you're asking for. Try these codes with the regular Pac-Man 2 ROM and when the game starts, don't touch anything and see if that's kind of what you want. The Sega and Namco screens are still there, but it automatically skips the entire sequence where the ghosts are running around, it automatically skips the Pac-Man 2 title screen, and it automatically goes from the Start screen to the original Pac-Man game, all without having to touch anything.
I can also have it skip the Sega and Namco screens, but I think it looks better with them (and I was too lazy to do them). There are 5 codes below, although I'm pretty sure I can get that down to 2 or 3 codes (it is currently just skipping each section instead of jumping past all of them).
Pac-Man 2: The New Adventures (Genesis) Game Genie
Skip the opening sequences and automatically boot into the original Pac-Man game.