Or simply Luigi's Mansion 2 in regions outside of North America. :)
I just beat this game earlier today and I have to say it was AMAZING. I loved all the mansions and the story and both Luigi and Professor E. Gadd made me laugh constantly. XD And the ending was very sweet. It was just the kind of ending I'd been waiting for in a Luigi game, in fact.
I also found it WAY harder than the first game. I enjoyed the challenge, even if it frustrated me a little. lol I want more Luigi games, including more Luigi's Mansion titles! I think the next one ought to be yet another sequel and feature the ghost dog again, only this time, the cute spectral pooch should team up with Luigi to help him catch the bad ghosts. The pooch could sniff out hidden spirits or other paranormal stuff. This is the only idea I've got so far, but yeah. lol
Anyone else here playing Dark Moon? I can give some help now that I've completed the game. I haven't gotten every Boo and gem yet though.