Go to the Creation Hall. Hold L and press X,Y,B,A,A. A noise will play.Astronaut Template!: L+X,Y,B,A,A
Knight Template!: L+X,Y,B,AA
Ninja Girl Template!: L+X,Y,B,A,A
Spartan Template!: L+X,Y,B,A,A
Super Girl Template!: L+X,Y,B,A,A

Hold L and press B, B, A, A, X in Draw mode. Use the templates to design and
draw your own creations.

Hold L and press Y, X, Y, X, A in Draw mode. Use the templates to design and
draw your own creations.

Hold L and press Y, A, B, A, X in Draw mode. Use the templates to design and
draw your own creations.

Hold L and press X, Y, B, A, A in Draw mode. Use the templates to design and
draw your own creations.

To unlock the secret town, throw a total of 10,000 rapo coins into the town
well. Once you have done that, you can switch between the normal town and the
secret town at any time simply by tapping on the wishing well on the bottom
screen with your stylus.

Pause the level by presing start then hold the L button then when holding the L button
press: A,X,B,B,Y and then if you here a sound that says awwwwwwwww then it worked

Unlock Three Hidden Music Tracks
There's three hidden tracks unlockable at the bottom of the list in Isaac's item shop, marked with "?????". These are the Opening Credits (complete with animation), Mayor Rosa's song "Light of my Life", and the Ending credits song "Real Life", respectively.Unlock the last three Music tracks in Isaac's musicshop: Get the hidden Pirate Coin in every stage

Developer : 5th Cell
Publisher : THQ
Platform : Nintendo DS
Genre : Action-Adventure/Platform