Knuckles the Echidna (ナックルズ・ザ・エキドゥナ) is a fictional character from the Sonic the Hedgehog series.
Knuckles the Echidna (Modern)
He is an anthropomorphic echidna and the current guardian of the Master Emerald, a powerful ancient relic which is his solemn duty to protect from anyone who wants to abuse it. He is also the sole remaining descendant of the Knuckles Clan and last of the echidnas on earth. His dominant traits are his superhuman strength, and the two spike-like knuckles on each of his hands, from which his name is derived from, which he can use to dig with and climb up walls. He can also trap the wind under his dreadlocks to glide through the air. A loner by nature, Knuckles is independent, headstrong and serious, yet gullible and short-tempered to a fault. He is fully devoted to his duty, spending most of his time on Angel Island protecting the Master Emerald, and rarely cares for anything that is not important.


Sonic Underground

Knuckles was born alone without knowing his parents, and raised on Angel Island as the last surviving member of the Knuckles Clan, a long-lost race of echidnas devoted to protecting the Master Emerald from being abused. However, Knuckles' own past was a mystery to him; he knew nothing how he came to be, and believed himself to be the last of his kind entirely. The one thing he did know was that he had always been living on his island, protecting the Master Emerald. Knuckles knew from innate knowledge that his duty was his fate, and he was content with that. While he was a kid, he met Queen Aleena who told him that he would be the first ally of her children Sonic, Manic and Sonia to join them in the war against Dr. Robotnik.

Sonic X (Anime)

Not much of his past is known, except that he's been guarding the master Emerald his whole life.

Sonic Boom (Series)

Accordingly, Knuckles comes from Angel Island. Growing up, he was tutored by multiple teachers, but never managed to retain their lessons. He eventually settled on Bygone Island. Knuckles consistently pestered a guy named Charlie by fooling around with his workplace's inventory, costing Charlie his job.

Knuckles was with Sonic, Tails and Amy in another endeavor to foil Dr. Eggman's plans, where they chased him and Metal Sonic to a new island. Following a brief separation, Team Sonic reunited at a mysterious tomb, where Metal Sonic cornered them with Eggman's new Destruction Troops. Though Knuckles insisted they did not need saving, Sonic took the crew into the tomb to save them. As they tried escaping the sealed tomb, Knuckles quickly blamed Sonic for their predicament, just as they accidentally awoke Lyric the Last Ancient, which Knuckles also blamed Sonic for. The group was then tied up by Lyric with his shackles as the snake escaped, but they used the shackles―now converted into Enerbeams―in an fruitless attempt to catch Lyric.

With Lyric gone, Team Sonic sought information from Cliff. The archaeologist revealed that Lyric was an evil Ancient who planned to power his Sentinel army with the Chaos Crystals to destroy all life in the world, but was imprisoned by his race when they discovered the plan. The group thus set out to retrieve the Crystals before Lyric. As they sought one Crystal in an Abandoned Research Facility, where the team split up, Knuckles and Amy met MAIA, a robot who rebelled against Lyric, who, with their aid, helped Sonic and Tails get a map to the Crystals while Knuckles and Amy got the second Crystal.

Continuing their hunt, Team Sonic subsequently faced a short alliance between Lyric and Eggman, Metal Sonic who had been reprogrammed to serve Lyric, and the power struggle between Lyric and Eggman. Needlessly, the team overcame every foe and got each Crystal. When obtaining the last one though, Lyric had his robots surrounded Sonic and demanded that Knuckles, Tails and Amy gave up their Crystals if they wanted Sonic alive. Though Knuckles and his friends surrendered the Crystals, Lyric still had his robots attack Sonic. Much to Knuckles' relief however, Sonic survived, and the team followed Lyric to his lair to stop him for good. In the following battle, Lyric used the team's Enerbeams to ensnare them, but before he could destroy Team Sonic, Eggman ambushed Lyric from behind, freeing the group. Knuckles then joined Sonic in incapacitating Lyric for good, during which Shadow the Hedgehog dropped by from an earlier battle, where Knuckles helped Sonic dispose of Lyric's technopathy device. As Sonic and Knuckles got back on good terms, they returned to the Village to celebrate their victory.

Knuckles, Sonic and Tails and Amy rescued Sticks when she was caught in a rockslide. Brushing off Sticks' claims that an underground army would destroy them all, Knuckles followed Amy to an ancient temple she was researching where he stood guard outside. Later, Knuckles teamed up with Sonic, Tails and Sticks to track down and save Amy who had been kidnapped by Lyric and his robot army, who sought to use her archaeological knowledge to find a Lost Crystal of Power and seize its power.


Sonic Underground

Knuckles has a tough personality, dedicated to keeping his island afloat. However, he tends to be gullible and easily misled, thus leading to his attacks on the Sonic Underground.

Sonic X (Anime)

Knuckles is serious, aloof, stubborn and does not adapt easily. Headstrong and inflexible, Knuckles prefers to do things his own way which causes him to clash with others. Regardless, he is very strong-willed, seldom wavering in his determination.

Unlike the rest of Sonic's group, Knuckles walks his very own path and is able to fight many people on his own, due to his brute strength and competence at martial arts. He also never gives up once he has a goal to accomplish, especially when its about finding the Master Emerald which is his job/duty to protect it. When on a serious mission, Knuckles is extremly self-sufficient and only says a few words.

Knuckles grew up believing in honesty, and holds a strong and steadfast belief that there is good in everyone, which always lets him give people (especially Eggman) second chances. However, this makes him very naive, quite gullible and easily misled, which has given him a history of being tricked by Eggman.

Though he is cool and determined in battle and most stressfull situations, Knuckles has an extremely short temper which leads to aggression, and is difficult to talk to or reason with when he is angry. Though his wild-temper has often been known to get him into trouble, Knuckles uses his anger to fight off his enemies.

Knuckles holds a special loneliness as he is the last of his tribe of Echidnas that lived on Angel Island for generations and believes that he will never see any one like him in his lifetime. Despite of this though, he believes that he is the only person who can carry out the task of protecting the Master Emerald to ensure no one abuses its power.

Despite his solitude, temper and blunt honesty, Knuckles is quite understanding and kind, and respects those who are nice in return, but keeps to himself. However, he shows alot of empathy, especially for people he believes need some comfort. Knuckles is also extremely selfless, risks putting himself in danger to save people's lives, even if its a villain or disliked person.

Sonic Boom (Series)

Knuckles is described as a "punch-first-and-keep-punching-until-you-need-a-punch-break" kind of echidna, and the best solution to a problem for him is to smash it to pieces. He is determined and strong of character, but tends to be rather cocky and get into trouble. Knuckles also has a huge ego: he clearly thinks of himself as his team's leader and most capable member, and fancies himself very heroic, although his self-admiration makes him exaggerate his own recollection of his accomplishments to the point of absurdity. Proud of his manliness, Knuckles has a very macho-orientated attitude which at times makes him sound somewhat archaic. Despite his tough personality, though, he is a softy on the inside with some noticeable preferences in particular: he loves nature and is very loyal to his friends. Noticeably, Knuckles has a habit of saying "not cool" to others when they do something he disagrees with.

Knuckles is the opposite of Sonic: he is stubborn, likes to take his time and very naive. He is far from intelligent, admitting himself that he is "as dumb as a rock," and is a little slow on the uptake, particularly when it comes to elaborate plans and math problems as even simplified explanations takes him a long time to process. He is also a bit goofy at times and easily distracted to the point where he is drawn to things as simple as shiny objects. Knuckles is not entirely dim-witted however, as he a few occasions shown some great insight, cunning, witticism, and even resourcefulness in battle.

Knuckles is a little sensitive about his intelligence. While he accepts he is not the smartest, he takes great offense when being called stupid and will go to extreme lengths to prove otherwise. Also, when Knuckles got his team into trouble with a half-baked plan, he sunk into a depression over his imposed stupidity until his friends restored his confidence.


Sonic Underground
He has red fur and wears white gloves. He has small black pupils and sometimes wears a brown hat. He also wears sneakers.
Sonic X (Anime)

He has red fur and black eyes. He wears white gloves that has points on it. He also wears red yellow sneakers. His tail is curve and is also red.

Sonic Boom (Series)

Knuckles closely resembles his main series counterpart in overall characteristics, but is quite drastically different in terms of physical proportions. He is much larger than all of his team-mates, standing over a head taller than Sonic, and is considerably more muscular. He has a rather large torso, broad shoulders and thick muscular arms, making him very top-heavy, and possesses longer legs and quills. Also, like his main counterpart, he has a white, crescent moon-shaped mark near the top of his chest.

For attire, Knuckles wears a pair of red and yellow shoes, designed with wrap-like markings, that have green cuffs and grey metal plates on top. He also wears gloves with knuckle-spikes on them and has white sports tape wrapped around his hands, the lower half of his arms and legs, and his biceps, making him similar to a Muay Thai boxer. He also occasionally wears his Communicator.


Sonic Underground

Years later, Knuckles met Sleet and Dingo who tricked him into believing that Sonic, Manic and Sonia where thieves after his island's Chaos Emerald. When Sonic, Manic and Sonia arrived on the Floating Island to find their mother, Knuckles attacked them until Sonic saved his life. After cleared up the misunderstanding, Knuckles and the hedgehog siblings teamed up to reclaim the Chaos Emerald Sleet and Dingo had stolen before the island fell from sky, and they became the allies Aleena wanted. When Dr. Robotnik found another Chaos Emerald, Knuckles aided Sonic, Manic and Sonia in reclaiming and containing the Chaos Emerald when it ran rampant.

Sonic X (Anime)

Season 1

Season 2

Season 3

Sonic Boom (TV Series)

Film Appearances

Sonic movie 4

Video Games

Knuckles the Echidna is a playable character in all the following video games:

  • Sonic the Hedgehog 3
  • Sonic & Knuckles
  • Sonic the Hedgehog Triple Trouble
  • Knuckles Chaotix
  • Sonic the Fighters
  • Sonic 3D Blast
  • Sonic R
  • Sonic Blast
  • Sonic Adventure
  • Sonic Shuffle
  • Sonic Adventure 2
  • Sonic Advance
  • Sonic Advance 2
  • Sonic Advance 3
  • Sonic Heroes
  • Shadow the Hedgehog
  • Sonic Battle
  • Sonic Rush
  • Sonic Riders
  • Sonic Riders: Zero Gravity
  • Sonic Free Riders
  • Sonic the Hedgehog (2006)
  • Sonic Rivals
  • Sonic Rivals 2
  • Sonic Chronicles: The Dark Brotherhood
  • Sonic Colors
  • Sonic Generations
  • Sonic Lost World
  • Sonic Boom Rise of Lyric
  • Sonic Boom Shattered Crystal
  • Sonic Boom Fire & Ice
  • Sonic Forces (non playable)
  • Sonic Mania



Sonic the Hedgehog

Sonic Unground
Sonic X
Sonic Boom

Sonia the Hedgehog

Manic the Hedgehog

Miles "Tails" Prower

Amy Rose

Cream the Rabbit


Vector the Crocodile

Espio the Chameleon

Charmy Bee

Blaze the Cat

Jet the Hawk=

Rouge the Bat

Silver the Hedgehog

Shadow the Hedgehog

Mighty the Armadillo

Shade the Echidna

Sticks the Badger

Christopher Thorndyke

Chuck Thorndyke


Dr. Eggman



Metal Sonic

Fang the Sniper



Black Doom

Black Arms

Knownable Relatives


Voice Actors

  • Japanese : Hideyuki Umezu (Sonic Underground), Yasunori Matsumoto (Sonic movie 2), Nobutoshi Canna (1998 – Present)
  • English : Brian Drummond (Sonic Underground), Bill Wise (Sonic movie 2), Chris Niosi (Sonic movie 4), Michael McGaharn (1998), Ryan Drummond (2000), Scott Dreier (2001 – 2004), Dan Green (2005 – 2010), Travis Willingham (2010 – Present)

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