Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
Black-brown, red, black
Devil Doom is a transformation that appears in the comic series and its spin-offs published by Sonic the Hedgehog Archie Comics. It is the transformed state of Black Doom.
In this form, Black Doom becomes much larger and intimidating than before; his body is almost completely changed. The only traces of his original form is
Doom's Eye, his horizontal horns, and his red and dark skin.
As Devil Doom, Black Doom has a gargoyle-like head with Black Doom's horizontal horns and Doom's Eye as its only eye, two large and thick round wings, and horizontal mouth parts. His torso also has strange spines pointing downward.
Black Doom assumed this transformation to battle
Super Shadow, leading to his death at the hands of the black hedgehog. 
Powers and abilities
Devil Doom is a powerful transformation, being strong enough to battle
Super Shadow. He also has the ability to fly.
Alf Layla wa-Layla | Baker | Burning Blaze | Chaos' forms ( Chaos 1, Chaos 2, Chaos 4, Chaos 6, Perfect Chaos) | Color Power | Dark Queen | Dark Shadow | Darkspine Sonic | Devil Doom | Excalibur | Excalibur Sonic | Finalhazard | Gaia Colossus | Giga Metal | Hero Shadow | Hyper Mode | Hyper Knuckles | Hyper Sonic | Master Core: ABIS | Mephiles' monstrous form | Nega-Mother Wisp | Neo Metal Sonic ( Metal Madness, Metal Overlord) | Perfect Dark Gaia | Phantom Heavies ( Phantom Gunner, Phantom King, Phantom Magician, Phantom Rider, Phantom Shinobi) | Roboticization | Sonic the Werehog | Super transformation ( Classic Super Knuckles, Classic Super Sonic, Classic Super Tails, Flicky's Super State, Mecha Sonic's Super State, Pir'Oth Ix's Super State, Super Knuckles, Super Mighty, Super Ray, Super Shadow, Super Silver, Super Sonic, Super Tails, Ultimate Gemerl) | Ultimate Emerl | Void's transformation
Sonic the Comic Perfect Chaos | Super Sonic ( Mirror Zone)
Adventures of Sonic the Hedgehog Roboticization | Super Robotnik | Supreme High Robotnik
Archie Comics Pre-SGW
Chaos' forms ( Chaos 6, Perfect Chaos) | Chaos Knuckles ( Dark Mobius, Light Mobius) | Chaos Shadow | Crystalline Magic ( Crystal Golem) | Enerjak ( Dark Enerjak) | Finalhazard | Metal Overlord | Perfect Tikhaos | Roboticization ( Blaze Woman, Charmy Man, Espio Man, Knuckles Man, Mecha Knuckles, Mecha Sally, Mecha Sonic, Mecha Tails, Rose Woman, Rouge Woman, Shadow Man, Silver Man, Tails Man, Vector Man) | Super transformation ( Hyper Knuckles, Hyper Tails, Master Mogul, Super A.D.A.M., Super Armor Mega Man, Super Scourge, Super Shadow, Super Silver, Super Sonic ( Dark Mobius, In Another Time, In Another Place), Turbo Tails, Ugly Naugus, Ultra Sonic ( Eco Sonic, Polar Sonic, Solar Sonic)) | Titan Metal Sonic | Titan Tails | Werehog
Burning Blaze | Chaos Shadow | Crystalmancy ( Crystal Omega, Crystal Sonic) | Devil Doom | Monster Form | Neo Metal Sonic ( Metal Overlord) | Overclocked Nicole | Perfect Chaos | Perfect Dark Gaia | Roboticization ( Blaze Woman, Charmy Man, Espio Man, Knuckles Man, M'egga Man, Rose Woman, Rouge Woman, Shadow Man, Silver Man, Sonic Man, Tails Man, Vector Man) | Sonic the Werehog | Super transformation ( Super Armor Mega Man, Super Shadow, Super Silver, Super Sonic)
Sonic X Chaos' forms ( Chaos 2, Chaos 4, Chaos 6, Chaosbot, Perfect Chaos) | Cosmo's transformation | Dark Sonic | Final Lizard | Final Mova | Serpenter | Super Shadow | Super Sonic
IDW Burning Blaze | Master Overlord | Neo Metal Sonic | Sonic the Werehog | Super Neo Metal Sonic | Super Sonic
Chaos Dingo | Regeneration | Roboticization ( SatAM, Sonic Underground)