Knuckles the Echidna (Sonic X)

"Knuckles never runs from a fight!"

- Sonic X ep.3

Knuckles the Echidna is an anthropomorphic, wild and tough echidna. Personality-wise, he is stubborn and doesn't adapt easily. Once he and Sonic the Hedgehog were rivals, but their differences have been resolved. Despite this, he is often jealous of Sonic's free spirit (Rouge the Bat once stated that Knuckles had an "inferiority complex"). He is famous as a treasure hunter and a master of martial arts. Knuckles' primary ability is strength, his arms are so powerful that he can shatter rocks. Ever since the first Chaos Control incident, Knuckles has become dedicated to finding the Chaos Emeralds so he can go back to his job of guarding the Master Emerald.

History
Knuckles hails from an unnamed world in a parallel dimension to Earth. Until the Sonic Adventure and Sonic Adventure 2 adaptions in Earth, Knuckles is desperate to find a solution to return back to their dimension on his own. However, he has helped Sonic and his friends whenever Doctor Eggman stirred up trouble. His role is minor until the video game adaptions and then minor again.

In Season 3 after returning home, he joins the heroes gathering the Chaos Emeralds in space in order to defeat a new villainous group, the Metarex and their leader, Dark Oak. After this adventure the heroes head back to Sonic's world which he fails to see Chris leaving and declares war on Doctor Eggman with the others.

Characteristics
Knuckles has one weakness; he is quite gullible much like his video-game counterpart as he has been tricked more than a few times throughout the series. The "unseen love" between Knuckles and Rouge grows in Season 3. This includes more yelling, more tricks, and working together to defeat the Metarex.

Knuckles once had to use the Master Emerald to power up the Blue Typhoon. At first he was too stubborn to use it, but after a serious beat-down by Amy, Cream the Rabbit, and Cosmo the Seedrian (with no help from Sonic), the Master Emerald had to be used. The Emerald dies when powering up the Sonic Overdrive cannon to defeat the Metarex and save Sonic from them in episode 76. Rouge the Bat has a crush on Knuckles, and he blushes when she flirts with him.

Rouge the Bat
Rouge is Knuckles' rival, especially in treasure hunting. The way Knuckles can punch is just like the way Rouge can kick. The two can get into heated or playful arguments. Rouge constantly teases Knuckles because of his grumpy attitude. In the Sonic X bio, it is revealed that she has a crush on Knuckles, however it is unknown whether Knuckles returns the same feeling for her, but in a few episodes it is hinted that he may like her.

In the episode The Volcanic Venture, Knuckles and Rouge had to team up with Sonic to go into a volcano; however the two couldn't get along and were constantly arguing, but Sonic didn't mind it. But somewhere in the end of the episode Rouge flies off, Knuckles asks her where is she going; she said that she'll find Chris, Knuckles tells her to stop, he shyly smiles and says, "Hehe! Good Luck!", Rouge replies that she'll be back and comments that he is "handsome".

In episode 52, Knuckles and Rouge were simply talking to each other, until they came to a heated fight, because Knuckles was making fun of Sonic and Rouge didn't like that and said that she knows that Knuckles actually misses Sonic and he should be lucky that she came and gave him company, Knuckles couldn't admit that fact and said that she is actually the one who is missing Sonic. After brutally hitting each other, they see Super Sonic flying in the sky, they stopped fighting and Rouge asked that it is useless to fight like this, Knuckles comments that Rouge looks "awful" with dirt covered on her face, Rouge then jumps on Knuckles with the camera facing the moon, and it is believed that she's tickling him (kissing him in the Japanese version), since Knuckles was heard laughing hysterically and shouting. "Rouge, stop!! That tickles!" Even if they really are fighting, it is done in a playful manner.

Friends and Allies

 * Sonic the Hedgehog (Friendly Rival and good friend)
 * Miles "Tails" Prower (Best Friend)
 * Amy Rose
 * Cream the Rabbit
 * Christopher Thorndyke
 * Cheese
 * Shadow the Hedgehog
 * Vector the Crocodile
 * Espio the Chameleon
 * Charmy Bee
 * Vanilla the Rabbit
 * Big the Cat
 * Emerl
 * Tikal the Echidna
 * Cosmo
 * Rouge the Bat
 * Hawk (Great Friend)

Rivals

 * Sonic the Hedgehog (Friendly Rival)
 * Rouge the Bat
 * Emerl (After obtaining a Chaos Emerald)

Foes

 * Dr. Eggman
 * Bocoe and Decoe
 * Bokkun
 * Chaos
 * Dark Oak
 * Yellow Zelkova

Trivia

 * Knuckles uses the third most amount of Engrish in the Japanese version coming right behind Eggman, who uses the second most amount of Engrish, and Sonic himself, who uses Engrish at least once in practically every episode.
 * In some scenes of Sonic X, Knuckles' mittens are drawn as gloves and in other scenes, his eyes are colored green.
 * In episode 65, Vector the Crocodile says "When I'm through with him (Knuckles), even his own mama won't notice him." Vector is probably mentioning Knuckles having a mother, thus making him possibly the second character (after Cream) to have any parents mentioned in the show although this is mainly an exaggeration.
 * Knuckles is the last friend of Chris to speak with him personally as seen in the last episode. They had their final conversation next to the Master Emerald.