Medal system:
The game's passwords work by entering various medals. To change the default medal (Bronze) to one of the others, press Down the following number of times:

Cross: Press Down.
Valor: Press Down(2).
Silver: Press Down(3).
Honor: Press Down(4).
Bravery: Press Down(5).
Crown: Press Down(6).
Diamond: Press Down(7).

Invisibility:
Enter Crown, Bronze, Honor, Valor as a password.

Level skip:
Enter Honor, Valor, Bronze, Silver as a password. Pause game play and press Select to advance to the next level.

Unlimited time:
Enter Diamond, Honor, Cross, Crown as a password.

Level	Password
2	Bronze, Cross, Crown, Bravery
3	Diamond, Bravery, Honor, Bronze
4	Cross, Bravery, Bronze, Bronze
5	Honor, Crown, Diamond, Crown
6	Valor, Diamond, Cross, Silver
7	Honor, Valor, Cross, Bronze
8	Diamond, Silver, Cross, Crown
9	Honor, Valor, Bravery, Diamond
10	Bronze, Bravery, Cross, Bravery