- mansions are mission-based
- E. Gadd created the Pixellator, a transporter that instantly zaps Luigi to mansions
- Luigi performs a lot of gags and slapstick comedy
- ghosts perform all sorts of animations while floating about: laughing at Luigi, scrambling away when he tries to suck them up and more
- while you explore, you'll see rooms you can't get into right away
- coins and cash are hidden everywhere, in drawers, in the pockets of coats and under carpets