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Some say you can break it by jumping. Others suggest you need to use the cannon in the courtyard to break it.
you have to hit the picture of princess peach and then you`ll see the box and aim at it and fire.
you go in peach's portal in the front of the castle and the 2d black box
Yes, only in the game Super Paper Mario for Wii.
No. :'(
look at the sun with luigi ground pound that 2d black button to unlock
It is a flash anime loosely based off of super Mario 64 (2d) (not made by Nintendo
There's a secret 2D game?!? I don't believe it.
In Super Paper Mario you have the ability to Flip to 3D from 2D, you can not do this in any other Paper Mario games.
yes You can't at the moment play it on a computer. But if u want a 2D adventure look up Super Mario 63. Not 64.
i have it it does nothing messes up the bottom screen don't use it
try to jump into the 2d black box. when you done that go to the castle roof. jump into the painting with the big peach picture. you will be in a hallway and at the end there is a waluigi picture. jump in it and you will be in the pirhana pit. fight the really big pirhana plant. beat him to get the waluigi key.