Muppets Party Cruise PlayStation 2 Cheats and Tips

Highlight an unlocked game when you are in the Short Cruise mode then press X + L + (right arrow) to unlock the game which is to the immediate right of the highlighted game.

Pressing X + L + (left arrow) will unlock the game to the immediate left of the highlighted game.

Pressing X + L (down arrow) selects the game immediately below the highlighted game and X + L (up arrow) the game immediately above it.

I discovered this myself:

To play a "locked" game in the "short cruise" mode: When in the "short cruise" mode, highlight an unlocked game. Then, instead of pressing X (which would select that unlocked game), press X + L1 + [right arrow] to unlock the game to the immediate right of the highlighted game. Or press X + L1 + [left arrow] to unlock the game to the immediate left of the highlighted game.

Or press X + L1 + [up arrow] to unlock the game immediately above the highlighted game. Or press X + L1 + [down arrow] to unlock the game immediately below the highlighted game.