Big head mode
Pause the game, then hold Select and press L1, Up, Right, L2, Up. Release Select, then hold Select again and press L1, Up, Right, L2, Up.
01/10/00 Unknown
Press start and hold select at the area that is listed and then enter the cheats.
All dream keys
Enter this code at the House hub. O, L1, L2, L1, L2.
All Winks
Enter at House Hub. Left, Down, Right, Right, Right.
Reset Moons
Enter anywhere. Up, L2, Left, R2, Left.
Reset Z's
Anywhere. Right, L1, Up, R1, L1
All Cogs
Anywhere. Down, R2, L1, Up, R2.
Reset Lives
Anywhere. L1, Up, Right, L2, Up.