VGFacts

beat_that_potato claims that the beta title for the game was Luigi's Mansion 2.
It's actually still called Luigi's Mansion 2 in Europe for whatever reason. Here's the box, straight from my very own scanner (I'm from Belgium):

The forum doesn't support JPEGs for whatever reason, so I had to Tinypic it.

I've revised the submission :)

Thanks for pointing that out (I probably should have, since I'm British myself...)