If you haven’t stumbled upon this Adventure Time DS/3DS Easter egg yourself yet, here’s the game’s fantastic “Secret Screen” that you can access after punching in the famous Konami code at the “Touch to Start” screen.
Secret screen, this is the secret secret screen. Ba-da-da-da-da-da-da secret screen.
Buy: Adventure Time for DS and 3DS
See also: More mathematical Adventure Time posts