I don't believe anyone's suggested this, and while it wouldn't raise difficulty, I think it would be fun to muck about with. I'd like to suggest a Full Power Mode cheat, where if activated, all characters start completely powered up. I suppose it would be very newbie friendly, but at the same time, it would be fun to start fully powered up upon each death as opposed to starting with nothing. And if this suggestion isn't appealing, could there be power retention at least? Where if the game is beaten with a character, they keep all of the powerups they had on the next playthrough? I know Survival Mode offers the ability to burn lives for power-ups, but I'm hoping for something that lets me start up and muck about with Bill or Sophia without having to grab the power-ups.