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Knuxmerald is the cargoship between Knuckles and the Master Emerald from the Sonic the Hedgehog fandom.


In most canons, Knuckles is the guardian of the Master Emerald.


Sonic the Hedgehog 3

When playing as Sonic and/or Tails, he/they will later in the game reach the Hidden Palace Zone, fighting Knuckles along the way. After defeating the echidna once, Sonic and/or Tails will end up in a room where the seven Super Emeralds and the Master Emerald lay standing. Suddenly, Dr. Robotnik in his Egg Mobile snatches the Master Emerald out of its shrine and got away, not before shocking Knuckles as the echidna clung up on it. The trio activated a teleporter to Sky Sanctuary Zone. Eventually, Sonic or Tails defeats Dr. Robotnik and both of them return the Master Emerald to its shrine, floating Angel Island back from the sea.

Sonic & Knuckles

On Angel Island, an Eggrobo stole the Master Emerald, prompting Knuckles to chase after the Badnik. The echidna was able to destroy it by luring Mecha Sonic as the latter tried to use a Spin Attack on him. Despite Mecha Sonic using the Emerald to increase its power, Knuckles defeated it nonetheless and was able to return the Emerald back to the island with the help of Sonic and his Tornado.

Sonic the Hedgehog 3 & Knuckles

Knuckles’ side of the story takes place after the events of Sonic the Hedgehog 3, but otherwise the gameplay is almost the same as in Sonic & Knuckles. In the latter half of the game, the Master Emerald transforms the seven Chaos Emeralds into Super Emeralds. When all seven Super Emeralds are found, Knuckles can be transformed into Hyper Knuckles.

Sonic Adventure

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Sonic Adventure 2

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Eggman steals the Master Emerald, prompting Knuckles to shatter it into pieces while it is in tow. This enraged Rouge, torturing him for a few seconds. Later in the game, the echidna saves Rouge from falling, relinquishing her hold of the Emerald shards to him. Knuckles reforms the shards back into the Master Emerald.

Sonic Mania

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Sonic the Comic

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Archie Comics

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IDW Publishing comics

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TV Shows

Sonic Underground

While the Master Emerald itself is not mentioned by name, the Floating Island’s Chaos Emerald serves the same purpose. Knuckles’ first priority was to stay and guard the Chaos Emerald in order to keep the island from falling, despite protests from Sonic and his siblings. When the Emerald got stolen, Sonic helped the echidna get it back before the island hit the ground.

Sonic X

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The Master Emerald remained unguarded when Knuckles was transported away from Angel Island. Knuckles made it his mission to return home in order to reunite himself with the Emerald.

The Chaos Emerald arc follows the same storyline as in the Sonic Adventure game: Dr. Eggman summons Chaos inside the Emerald, shattering it out of the island, and Knuckles collecting the shards to return the Emerald to its full capacity once again. Unlike in Sonic Adventure 2, the Master Emerald does not shatter again; instead, Rouge steals the Emerald outright, eventually returning it to Knuckles still intact.

In “Cosmic Crisis”, Chris used the Master Emerald as an alternative to the already-scattered seven Chaos Emeralds to power up the Blue Typhoon. Provoked by the theft of the Emerald, Knuckles confronted Chris and demands to return it to the island. He was forced to accept the decision of letting it stay on the Blue Typhoon after Amy, Cream, and Cosmo “knocked some reason” on him. Later, the Emerald was used to power up the Sonic Power Cannon in an attempt to weaken Dark Oak’s new planet, draining it much of its power and once again shattering it in the process. According to Dr. Eggman, it would take years for the Emerald to return to its former powered-up state. In the final episode, Knuckles affirms that the doctor should “better not touch the Master Emerald”.

Sonic Boom

While Tails announces Knuckles originating from Angel Island in “Cowbot”, there is no mention of the Sonic Boom counterpart of the Master Emerald.

Sonic Mania Adventures

In “& Knuckles”, Knuckles was first seen carrying the Master Emerald in a forest within Angel Island. He then stopped to take a rest. Hearing a crash nearby, he thought of Dr. Eggman, the Heavy King, or Sonic attempting to steal the Emerald once again. Ray the Flying Squirrel landed beside the echidna and rolled around the Emerald. He greeted Knuckles and asks him where Mighty the Armadillo was. Knuckles shrugged, while Ray glanced and tried to touch the Emerald. Knuckles immediately held him and flung him to the sky. Later, Knuckles fought a trio of RhinoBots while Eggman stole the Emerald using the Tornado. Thinking Sonic was responsible for the theft, he chased after the biplane in anger.

In “Metal Mayhem”, Knuckles charged through the lair and punched the already powering-up Metal Sonic, pushing both it and Eggman outside. The echidna then carried the Master Emerald out of the lair, unaware of the presence of Sonic, Tails, Ray, and Mighty nearby.


Some fans tend to pair Knuckles with the Master Emerald instead of another character, such as with Rouge or with Tikal. With the release of Sonic Mania Adventures, artwork involving Knuckles romantically interacting with the Emerald has grown in popularity. Some art may add a few characters alongside the emerald, such as Rouge or Shade.

This cargoship can go in tandem for other members of Team Sonic, the most popular being Sonic with chili dogs and Tails with the Tornado.



Knuckles and Master Emerald on DeviantArt
KnucklesXMasterEmerald on DeviantArt


knuxmerald tag on Tumblr


Sonic Adventure series

Sonic X

Sonic Mania


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Sonic the Hedgehog ShipsSonic the Hedgehog Characters
SHIPS het BartoniaBuntoineChaffronChareamEspadeEspicoleEspikalEspioniaInfinisperJetaveJooeyJuleenaKhanallyKnuxamyKnuxaraKnuxerciKnuxikalKnuxoniaKnuxougeKnuxulieManamyManinaMarinicMinashSallailsShadallyShadamyShadariaShadarineShadazeShadDashShadeamShadikalShadoniaShadougeShadsticksSilvamySilvazeSilvisperSonallySonamySonazeSonDashSoneenaSoneezieSoneliseSonerciSonicksSonikalSonionaSonisperSonminaSonougeTailamyTailarbyTailazeTailerciTailinaTailionaTailougeTailrineTailscoTailseyTailsmoTaireamVectamyVectilla
slash EspilverManourgeMephadowMephilverMonoSonicShadilverShadpioSonadowSonectorSoneggmanSonilverSonKaiSonMarioSontailsSonucklesVecpio
femslash AmooeyAmreamBlazamyBlazeamBunallyCosmooeyFionicMareamPeachamyPercamyRougamyRoupazSalamySallicoleSticmySurgeamyTangazeWhispangle
non-binary MetadowMetailsMetamyMetonicOmegadowRookiniteShardicoleTikaos
poly SconadilverSilvazamySonadilverSonSalAmy
family Sonic UndergroundVanilleam
friend Diamond CuttersSoneamTeam BoomTeam ChaotixTeam DarkTeam RoseTeam Sonic
cargo KnuxmeraldSonChili
CHARACTERS male Espio the ChameleonKnuckles the EchidnaMiles "Tails" ProwerShadow the HedgehogSilver the HedgehogSonic the Hedgehog
female Amy RoseBlaze the CatCream the RabbitPerciRouge the BatSally AcornSonia the HedgehogTikalZooey