Probably found, but...

[ranmafan]

Someone here has a video of how to get the companion cube and to bug the game so you get to see the cake!

http://www.gametrailers.com/player/usermovies/117488.html

Yeah someone else in the forums found a way based on the screenshots I saw but I couldn't find any posts on how to get it.

 

[xennyth]

haha, nocliiiiiiiiiip~