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Metal Knuckles[3] (メタルナックルズ Metaru Nakkuruzu?) is a character that appears in the Sonic the Hedgehog series. He is a robot created by Dr. Robotnik in the image of Knuckles the Echidna. He was used during the first World Grand Prix incident to counter Knuckles' participation.[3]


Metal Knuckles Model Sheet

Metal Knuckles, from Sonic R.

Metal Knuckles was created in the image of Knuckles the Echidna and is thus mostly built of red metal. He possesses a round head, a medium-long metallic gray muzzle with a pointy gray nose and has green eyes with black sclerae and pupils. He also has five long strips of red metal with joints and white intake tips extending downward from the sides and back of his head which are meant to resemble Knuckles' dreadlocks. Metal Knuckles possesses a red ellipsoid torso with a rectangular intake with a white rim on his chest and a rocket exhaust on his rear. Meanwhile, his arms consist of gray upper arms, red forearms, and long and thick paws with two gray and sharp claws for fingers, white rims around the claws, and yellow circles on the back of the paws. Metal Knuckles similarly has gray upper legs and red lower legs. Lastly, he has two feet resembling Knuckles' shoes, complete with a red color scheme, green cuffs, yellow stripes across the middle, dark gray soles, and bolted gray plates on top of his feet.


Sonic R[]

In Sonic R, Metal Knuckles was a secret weapon manufactured by Dr. Robotnik to overcome Knuckles the Echidna with in case Knuckles would prove to be a hindrance, having anticipated Knuckles' participation in the World Grand Prix, which Robotnik had tricked Sonic the Hedgehog into participating in to help him find the Chaos Emeralds.[3][4] The plan was then for Metal Knuckles, along with Robotnik and his other minions, to join the World Grand Prix as participants and be ready to attack Sonic and claim the Chaos Emeralds from him when the time was right.[4]

In the end, however, Sonic and his allies secured the Chaos Emeralds without Metal Knuckles and the others getting their hands on them.

Sonic Superstars[]

A skin based on Metal Knuckles makes an appearance in Sonic Superstars, being usable in the game's Battle Mode. He also appears as the boss of Cyber Station Zone if the player currently has his parts selected as their battle bot.


Metal Knuckles has displayed little to no personality of his own. However, he does possess a degree of autonomy, like being capable of posing victoriously after a winning a race.

In the Sonic the Hedgehog comics by IDW Publishing, Metal Knuckles lacks much of a personality, appearing cold and machine-like. However, he is still intelligent and will use any means to achieve his goal (which Knuckles likens to Metal Knuckles resorting to dirty tricks). For example, he willingly endangered some animals in order to distract Knuckles, knowing that the benevolent Knuckles would not allow harm to befall any creature, in order to steal his Chaos Emerald.[2]

Metal Knuckles is shown to have a strong dislike of Knuckles, with his first act after being set free from Heavy King's control being to attack Knuckles. Despite this, Metal Knuckles is fully loyal to Eggman under the influence of his base programming and will obey his every order.[2]

Powers and abilities[]

Possessing the same power plant as Metal Sonic, Metal Knuckles possesses high speed and acceleration power.[3] This allows him to move at super speeds, enough to compete in the World Grand Prix. Like Knuckles, Metal Knuckles is also capable of gliding through midair for a limited time and climbing walls with his large spikes. He is also seemingly quite durable, being able to withstand going toe to toe with Knuckles.

Metal Knuckles possesses super strength that is seemingly equal to those of Knuckles. Metal Knuckles also possesses a pair of blades on each of his hands that are sharp enough to cut a tree-sized mushroom down in one slash, and is capable of rocket-propelled, high-speed flight rivaling that of Metal Sonic.[2]




In other media[]

Books and comics[]

Sonic the Comic[]

Main article: Knuckles Metallix

The Knuckles Metallix, from Sonic the Comic #108. Art by Richard Elson.

In the Sonic the Comic comic series and its spin-offs published by Fleetway Editions, a similar character who was loyal only to Robotnik appears as a new version of Metallix. It made its debut capturing Sonic for the Drakon Empire[5] and then acting as a Prosecutor in Sonic's trial-by-combat. It came very close to killing him, but Tails managed to destroy it by sheer luck. The Metallix was only reused once, as Grimer used it to defeat Sonic so he could discover from him what happened to Robotnik; he then faked things so Sonic would not remember this and instead think he beat Metallix. In its three clashes with Sonic, the Knuckles Metallix has never been defeated. It was once shown that Robotnik had a whole army of them, but they were never shown in use.

Archie Comics[]

Metal Knuckles Archie

In the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics, Metal Knuckles is a Badnik copy of Knuckles and a part of the Metal Series, along with Metal Sonic, Metal Tails and Mecha Sally. He was created to help enforce the Dark Egg Legion, but got damaged and later possessed by the Krudzu Hybrid Hydra in Albion.

IDW Publishing[]

Seasons of Chaos[]
Metal Knuckles IDW Profile

Metal Knuckles, from Sonic the Hedgehog 30th Anniversary Special.

Although he served Dr. Eggman, Metal Knuckles fell under Heavy King's control when the robot used an override signal to take control of Eggman's robots. As such, Metal Knuckles helped kick Eggman out of his base in Winter Caverns Zone. Afterward, he was assigned by Heavy King to seek out the seven Chaos Emeralds.[2]

Arriving in Mushroom Hill Zone, Metal Knuckles ambushed Knuckles in order to take his Chaos Emerald. When Knuckles had him on the ropes, however, Metal Knuckles distracted Knuckles by making a giant mushroom cave in over some animals. While Knuckles hurried to save the animals, Metal Knuckles snatched the Chaos Emerald and escaped.[2]

Later, Metal Knuckles found another Chaos Emerald, which he was bringing to Heavy King. Arriving in Autumn Forest Zone as well, Metal Knuckles forcefully snatched another Chaos Emerald from Bean and escaped with it. Afterward, Metal Knuckles and Metal Sonic would engage Sonic and his crew when they arrived in Winter Caverns Zone to stop Heavy King. Metal Knuckles fought Bean ferociously until Eggman overrode the signal Heavy King used to control Metal Knuckles. Metal Knuckles immediately after turned his attention to Knuckles, but Eggman made him stop and team up with Sonic's crew. The group proceeded to confront Heavy King inside the base, who used the power of the seven Chaos Emeralds he had collected to battle them. Eventually though, Heavy King was defeated and returned to Eggman's side, who then ordered Metal Knuckles, Heavy King and Metal Sonic to take the Chaos Emeralds from Sonic's crew. However, the group had already left with the Chaos Emeralds. Metal Knuckles subsequently collapsed, as all of his energy had been spent from his recent excursions.[2]


  • Curiously, in Sonic R, Knuckles' own shoes are miscolored from his traditional design, whereas Metal Knuckles' shoes are colored correctly.


  1. Kazuyuki Hoshino on Twitter. Twitter (2 March 2021). Archived from the original on 2 March 2021. Retrieved on 2 March 2021. "Kazuyuki Hoshino: Trivia: Yuji Uekawa is the creator of Metal Knuckles"
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Sonic the Hedgehog 30th Anniversary Special, "Seasons of Chaos"
  3. 3.0 3.1 3.2 3.3 About Characters (Japanese). Sonic Channel. Archived from the original on 9 October 2009. Retrieved on 5 July 2015.
  4. 4.0 4.1 Sonic R (Sega Saturn) Japanese instruction booklet, pgs. 4-5.
  5. Sonic the Comic #108, "The Evil Empire, Part 1"