Side Projects/Guest Spots
Ever wonder what else members from King Diamond and Mercyful Fate do? Well here's a list of bands that members past and present have played on.
                                                                    Mercyful Fate Members

King Diamond (Kim Bendix Petersen) - Brainstorm (1977), Black Rose (1980), Brats (1981), Mercyful Fate (1981-Present), King Diamond (1985-Present), Usurper (Guest Vocals on 'Necronemisis' 2000), Probot (Guest Vocals on 'Sweet Dreams' 2004), Cradle Of Filth (Guest Vocals on 'Devil Woman' 2005)

Hank "De Wank" Shermann (Rene Krolmark) - Brats (1978-1981), Mercyful Fate (1981-Present), Fate (1985- 1987), Lavina (1988), Zoser Mez (1991), Gutrix (1997), Virus 7(2000), Skeletor (Guest Guitarist, 2000), Witchery (Guitars on 'Hearse Of The Pharaohs' 2001, Guitar Solos on 'The Wait Of The Pyramids' 2006), Jack Cracker (Guest Guitarist 2002), Force Of Evil (2003-Present), Locomotive Breath (Guitar Solo on 'Gargleblaster' 2005),  Eidolon (Guitars on 'The Oath' 2006)

Mike Wead (Mikael Wikstrom)- Witch (1981-1985), Maninnya Blade (1982-1985), Hexenhaus (1987-1992), Memento Mori (1992-1997), King Diamond (1993, 2001-Present), Abstrakt Algebra (1995), Mercyful Fate (1996-Present), Hemisfear (1999?),  The Haunted (Touring Guitarist, 2001), Firegod (2003-Present), Edge Of Sanity (Guitars on 'Crimson II', 2003)

Sharlee D'Angelo (Charles Peter Andreason) - Absurd (19??), Whipped Cream (19??), King Diamond (1993), Mercyful Fate (1993-Present), Singery (1997-1999), Witchery (1997-Present) Illwill (1998), Dismember (1998-Present), Arch Enemy (1998-Present), Hemisfear (1999?), Firegod (2003-Present), Spirtual Beggers (2004-Present)

Bjarne T. Holm (Bob Lance) - Fate (1985-1988), Mercyful Fate (1997-Present), Gutrix (1997), Virus 7 (2000), Force Of Evil (2003-Present)

Carsten Volsing - Mercyful Fate (1981)

Benny 'Bennett' Petersen - Mercyful Fate (1981-1982), Jackal (198?)

Kim Ruzz - Mercyful Fate (1982-1985) Currently a retired Postman....

Snowy Shaw - Colossus (19??), King Diamond (1989-1994), Memento Mori (1992-1995), Mercyful Fate (1993-1994), Norte Dame (1997-Present) Illwill (1998), Dream Evil (1999-Present)

Timi "Grabber" Hansen - Danger Zone (1981), Mercyful Fate (1981-1993), King Diamond (1986-1987), Lavina (1988)

Michael Denner - Iron Space (1974), VanDenner (1977-1980), Brats (1980), Danger Zone (1981) Jezabel (198?), Mercyful Fate (1982-1996), King Diamond (1986-1987), Lavina (1988), Zoser Mez (1991), Furious Trauma (Guitar Solo's on 'The Fifth Season' 1998), Jack Cracker (Guest Guiarist, 2002), Force Of Evil (2003-Present) Eidolon (Guitars on 'The Oath' 2006)

'Old Nick' Smith - Danger Zone (1981), Mercyful Fate (1981)

Morten Nielsen - Zoser Mez (1991), Mercyful Fate (1993), Furious Trauma (19??), Agressor (Guest Drummer on 1999's "Medieval Rites" album), Force Majeure (19??)

Ole Frausing - Mercyful Fate (1981)

Jan Musen - Mercyful Fate (1981)
                                                               King Diamond Members

King Diamond (Kim Bendix Petersen) - Brainstorm (1977), Black Rose (1980), Brats (1981), Mercyful Fate (1981-Present), King Diamond (1985-Present), Usurper (Guest Vocals on 'Necronemisis' 2000), Probot (Guest Vocals on 'Sweet Dreams' 2004)

Andy LaRocque (Anders Allhage) - EF Band (1985), King Diamond (1985-Present), Death (Guitars on 1993's "Individual Thought Patterns" album), At The Gates (Guitars on 1995's "Slaughter Of The Soul"album), Furious Trauma (Guitar Solo's on 'Focus Intact' 1998), Illwill (1998),  Falconer (Guitarist on 2002's "Chapters From A Vale Forlorn" album) Yyrkoon (Guest Solo on 'Horror From The Sea' 2006)

Mike Wead (Mikael Wikstrom) - Witch (1981-1985), Maninnya Blade (1982-1985), Hexenhaus (1987-1992), Memento Mori (1992-1997), King Diamond (1993, 2001-Present), Abstrakt Algebra (1995), Mercyful Fate (1996-Present), Hemisfear (1999?), The Haunted (Touring Guitarist, 2001), Firegod (2003-Present)

Hal Patino (Hasse Patino) - Speks (1979-1983), Malteese Flacon (1984-1986), Forever (1986), Geisha (1987), King Diamond (1987-1991, 2000-Present), Witchdoctor (1990), Dr. Butcher (1992), =Y= (1993), Blakk Totam (1993), Hellraiser (1996), Charon (2002), Force Of Evil (2003-Present)

Matt Thompson - King Diamond (2000-Present), Djugdish (199?-Present), Bat Castle (2003-Present?), Maylee Thomas(19??), Mushroom Groovy (19??), Wompi (19??)

Glen Drover - Eidolon (1993-Present), King Diamond (1998-2000), Dimesion Infinite (2003-Present)

David Harbour - Chastain (1998-1990), Leather (199?), Michael Harris (199?), King Diamond (2000)

John Luke Hebert - Chastain (1990), Leather (199?), King Diamond (1997-2000)

Chris Estes - King Diamond (1995-2000), Atrox (19??), Mindstorm (19??)

Herb Simonsen - King Diamond (1995-1998), Mindstorm (19??)

Darrin Anthony - King Diamond (1995-1997) Mindstorm (19??)

Pete Blakk - King Diamond (1987-1990), Totem Pole (199?)

Snowy Shaw - Colossus (19??), King Diamond (1989-1994), Memento Mori (1992-1995), Mercyful Fate (1993-1994), Norte Dame (1997-Present) Illwill (1998), Dream Evil (1999-Present)

Mikkey Dee - King Diamond (1985-1989), Geisha (198?), Dokken (198?), Motorhead (1992-Present), Helloween ( Drums on 2003's "Rabbit Don't Come Easy")

Timi "Grabber" Hansen - Danger Zone (1981), Mercyful Fate (1981-1993), King Diamond (1986-1987), Lavina (1988)

Michael Denner - Iron Space (1974), Brats (1980), Danger Zone (1981) Jezabel (198?), Mercyful Fate (1982-1996), King Diamond (1986-1987), Lavina (1988), Zoser Mez (1991), Jack Cracker (Guest Guiarist, 2002), Force Of Evil (2003-Present) Eidolon (Guitars on 'The Oath' 2006)

Floyd Konstantin - King Diamond (1985), Destiny (1986-1988), Geisha (198?)

Chris Whitemier - Drums (1988)

Sharlee D'Angelo (Charles Peter Andreason) - Absurd (19??), Whipped Cream (19??), King Diamond (1993), Mercyful Fate (1993-Present), Singery (1997-1999), Witchery (1997-Present) Illwill (1998), Dismember (1998-Present), Arch Enemy (1998-Present), Hemisfear (1999), Firegod (2003-Present), Spiritual Beggers (2004-Present)

Michael Moon - King Diamond (Touring Guitarist 1987) Madison (198?)

Roberto Falco - King Diamond (Keyboards Up Until "The Eye") (Produced as well), Makes movie/commercial music now.