Adventure Time: Hey Ice King! Why'd You Steal Our Garbage?! Cheats for 3DS
Also on: Nintendo DS
To view a hidden screen press Up, Up, Down, Down, Left, Right, Left, Right, B, A at the 'Title' screen.
When you have beaten New Game+ this feature will become available.
This feature becomes available when you have beaten the game once. To access New Game+ you have to hit the arrow next to the plus symbol on the 'File' select screen.
Complete the game once then at the file selection screen select the arrow next to the 'Plus' icon to unlock New Game+.