This character exists primarily or exclusively within the IDW Publishing continuity. Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
Blue, yellow, silver, red, white, black, navy
Red with black sclera
Master Overlord is a transformation that appears in the  comic series published by Sonic the Hedgehog IDW Publishing. It is the final form of Neo Metal Sonic, achieved through powering up with the combined power of Sonic and Shadow's biodata, as well as the Master Emerald.
Master Overlord is a dragon-like entity of massive size, dwarfing even the
Master Emerald's shrine. He has head armor similar to Neo Metal Sonic's, but with his quills combed more backwards, and he has two red eyes with black sclera aligned vertically on his face. Also, instead of a muzzle, he has a mouth with sharp teeth and red gums. He also has a long gray neck, a chest resembling a blue jet engine with a yellow and black intake, a thin gray spine for a torso section, and a blue pelvis that the Master Emerald is embedded in. Attached to his pelvis are four long, knife-like "legs". He also has a long purple and lavender-striped tail with two axe-like blades at the tip. Also, attached to both sides of his pelvis is a blue fin-like section, each one having three gray metallic wings with long knife-like feathers attached to them. He also has two arms, each of which is mostly made up of a gray cable with a thick blue gauntlet at the end. He also has four-fingered, round dark gray hands with knife-like gray fingers. Also, around each of his shoulders are two blue fin-like sections. Those fins closest to his torso also have three long gray spikes protruding upward from each of them.
The Battle for Angel Island
Master Overlord transforming, from
. Sonic the Hedgehog #10
After being forced out of his
Super State by Shadow the Hedgehog, Neo Metal Sonic managed to copy Shadow's biodata in the process. Combining his biodata with Sonic the Hedgehog's, Neo once again powered up with the Master Emerald and fused with his own fortress to become Master Overlord. He then demanded for Sonic to bow to him.
Powers and abilities
In this form,
Metal Sonic is implied to be even stronger than Super Neo Metal Sonic.
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)