Uncle Grimmly (ヤミノフ, Yaminofu^?), Hermit of the Darkness, is one of the Portrait Ghost found in Area Four in Luigi's Mansion.

In Luigi's Mansion[]

Uncle Grimmly appears in the Wardrobe Room exclusively during the Blackout. In order to light the mansion back up, Luigi has to go into the Breaker Room, although it is locked. In the Telephone Room, Luigi can have an optional conversation with Professor E. Gadd, who reveals that Uncle Grimmly took the key to the Breaker Room. Luigi must then go to the Wardrobe one, located in Area One to find Uncle Grimmly. When Uncle Grimmly sees Luigi, he attempts to scare him by screaming and wailing his arms while remaining in place. When he does this, he becomes vulnerable and with his heart exposed, Luigi can vacuum away all 100 of Uncle Grimmly's HP using the Poltergust 3000. After Uncle Grimmly is captured, a Treasure chest containing the key to the Breaker Room appears.

[Edit] / Nintendo 3DS version
Main characters	Main characters	Luigi • Professor E. Gadd • King Boo • Mario • Gooigi���
Ghosts	Normal	Bat • Black Bogmire • Blue Blaze • Blue Twirler • Boo • Bowling Ghost • Ceiling Surprise • Elemental Ghosts (Fire • Water • Ice) • Flash • Flying Fish • Garbage Can Ghost • Ghost Guy • Gold Ghost • Gold Mouse • Grabbing Ghost (Cinema • Mirror • Red) • Mouse (Blue • Purple) • Mr. Bones • Purple Bomber • Purple Puncher • Shining Ghost • Spark • Speedy Spirit • Temper Terror • Waiter
	Portrait Ghosts	Biff Atlas • Bogmire • Boolossus • Chauncey • Clockwork Soldiers • Floating Whirlindas • Henry and Orville • Jarvis • King Boo • Lydia • Madame Clairvoya • Melody Pianissima • Miss Petunia • Mr. Luggs • Nana • Neville • Shivers • Sir Weston • Slim Bankshot • Spooky • Sue Pea • Uncle Grimmly • Vincent Van Gore
	Other	Polterpup†
Rooms	Professor E. Gadd's Lab	Gallery • Portrificationizer Chamber • The Lab • Training Room
	Area one	Anteroom • Balcony • Foyer • Master Bedroom • Nursery • Parlor • Study • Wardrobe Room
	Area two	Ball Room • Bathroom • Boneyard • Butler's Room • Conservatory • Dining Room • Graveyard • Hidden Room • Kitchen • Laundry Room • Mirror Room • Storage Room • Washroom
	Area three	Astral Hall • Balcony • Bathroom • Billiards Room • Bottom of the Well • Courtyard • Fortune-teller's Room • Nana's Room • Observatory • Projection Room • Rec Room • Safari Room • Tea Room • The Twins' Room • Washroom
	Area four	Armory • Artist's Studio • Breaker Room • Cellar • Ceramics Studio • Clockwork Room • Cold Storage • Guest Room • Pipe Room • Roof • Sealed Room • Secret Altar • Sitting Room • Telephone Room
Items	Items	Bill • Blue Diamond • Coin • Element Medal (Fire • Ice • Water) • Gold Bar • Gold Bone† • Gold Diamond • King Boo's Crown • Mario's Glove • Mario's Hat • Mario's Letter • Mario's Shoe • Mario's Star • Pearl • Red Diamond • Stone (Blue • Green • Red)
Objects	Regular	Bomb • Boo Ball • Cheese • Mirror
	Hazards	Fake door • Fire
	Equipment	Boo Radar • Flashlight • Game Boy Horror • Poltergust 3000 • Strobulb†
Other	Other	Ghost Portrificationizer • Ghost's heart • Luigi's Mansion • Luigi's NEW Mansion • Mario's Painting
Items marked with † are exclusive to the Nintendo 3DS version.