A Portrait Ghost is a type of ghost that has 100 HP (excluding King Boo and Boolossus) in Luigi's Mansion and a main ghost that Luigi already caught with his Poltergust 3000. They can be found in the Art Gallery. Each Portrait Ghosts that clears an area is a boss portrait ghost. The Portrait Ghosts are:
Area 1[]
- Neville the Bookish Father
- Lydia the Mirror-Gazing Mother
- Chauncey the Spoiled Baby (Area Boss)
Area 2[]
- The Floating Whirlindas the Dancing Couple
- Shivers the Wandering Butler
- Melody Pianissima the Beautiful Piantist
- Mr. Luggs the Glutton
- Spooky the Hungry Guard Dog
- Bogmire the Cemetery Shadow (Area Boss)
Area 3[]
(Note: Although, Madame Clairvoya met Luigi in Area 2, he has to capture her in Area 3.)
- Biff Atlas the Bodybuilder
- Nana the Scarf-Knitting Granny
- Miss Petunia the Bathing Beauty
- Slim Bankshot the Lonely Poolshark
- Henry and Orville the Twin Brothers
- Madame Clairvoya the Freaky Fortune-Teller
- Boolossus the Jumbo Ghost (Area Boss)
Area 4[]
- Uncle Grimmly the Hermit of the Darkness
- Clockwork Soldiers the Toy Platoon
- Sue Pea the Dozing Girl
- Jarvis the Jar Collector
- Sir Weston the Chilly Climber
- Vincent Van Gore the Starving Artist