Ghoul Guys are gray Boo Guys and appears in Mario & Luigi: Partners in Time. Like the Boo Guy, they live in Shroob Castle, and attack in the same manner (albeit at an increased speed). They now have the ability to possess other enemies and increase their stats. In battle, a Ghoul Guy will roll into either Mario or Luigi — depending on who you're playing as — inflicting damage. However, preceding this, it will split into two transparent duplicates; one of which is the real Ghoul Guy, and the other one is just an impersonator. Your methods of disambiguation are quite simple; only the real Ghoul Guy can injure the Mario Bros.. The Ghoul Guy will point to the Mario brother the ghost will attack.
The difference between a Ghoul Guy and a Boo Guy is that a Ghoul Guy can merge its spirit with another enemy in the background. While the Ghoul Guy will disappear, the other creature will inherit the Ghoul Guy's stats, add them to its own, and will continue with the combined stats. For this reason, ensure that the Ghoul Guys are eliminated from existence before dealing with anything else.
HP - 157 (100)
POW - 155 (140)
DEF - 120 (105)
Speed - 46 (51)
EXP - 100
Coins - 10
Appearances in other games
Purple versions of Ghoul Guys appear in this game, but only in the boss battle of World 4. They appear from paintings on either side of Donkey Kong's platform when he ground pounds. They will wander around the stage for a few seconds, then spin around into a ball of smoke and explode.
- In Mini-land Mayhem's sound effects menu, the second part of their spinning attack's sound effect, which is the explosion after the spin, is absent when played there for unknown reasons.
|Big Boo • Bigger Boo • Black Boo • Boolossus • Boos in Luigi's Mansion • Boos in Luigi's Mansion: Dark Moon • Bootler • Franky • Herbert • Igor • King Boo • King Boo (Super Mario Sunshine) • Lady Bow • Lahla • Peeka • Spooky Speedster • Stanley • The Creepy Steeple Boo|
|Balloon Boo • Big Boo • Big Boo (Paper Mario) • Big Frame Boo • Big & Little Boo • Blindfold Boo • Bomb Boo • Boo • Boo Balloon • Boo Block • Boo Buddy Snake • Boo Buddy Swarm • Boo Guy • Boohemoth • Boo Man Bluff • Boo Stack • Calm Fishin' Boo • Circling Boo Buddies • Dark Boo • Dark Dark Boo • Disappearing Boo Buddy • Eerie • Fishin' Boo • Frame Boo • Ghoul Guy • Gold Boo • Green Boo • Li'l Boo • Mad Big Boo • Mad Boo • Mini Boo • Octoboo • Peepa • Phantom Guy • Red Boo • Shiny Boo • Sleepy Boo • Snufit • Stretch • Tail Boo • Terekuribō|