Arthur (Wreck-It Ralph)

"Insecurity detected."

- Arthur scanning Ralph's insecurities.

"Friend!!"

- Arthur through the clones of Ralph.

Arthur (also known as the Wreck-It Ralph Virus) is the main antagonist of Disney's 57th full-length animated feature film Ralph Breaks the Internet, the sequel to Disney's 52nd full-length animated feature film Wreck-It Ralph. It is an insecurity virus that was made to duplicate and spread throughout everywhere that is to be infected.

It was voiced by (in its original form), who also played Dr. Drakken in Kim Possible, and by  (through clones of Ralph).

Biography
6 years following the demise of Turbo and the Cy-Bugs, the game Sugar Rush is about to put out of order due to a broken steering wheel. Wreck-It-Ralph and Vanellope Von Schweetz (the game's princess) traveled to the Internet through a Wi-Fi router, where they made a purchase of a new steering wheel that will save the game, and that they have 24 hours to come up with the money to complete the purchase. To that end, Ralph posted several videos of himself to get on the top trends to earn some money.

However, Vanellope take solace in a new game called Slaughter Race and takes a strong interest. Though Ralph finally manages to earn enough money to buy the wheel (despite getting several bad reviews), he is distraught to learn that Vanellope has decided to stay in Slaughter Race rather than returning back to her old game. Desperate not to lose her as his friend, Ralph turns over to the Dark Web, which is ruled by Double Dan.

Upon hearing of Ralph's intentions, Double Dan presents him with his latest virus dubbed Arthur, warning him that it can analyze any imperfection and spread itself to other parts of its surrounding area. Ralph releases Arthur into Slaughter Race, and it scans Vanellope, inheriting her glitchiness and allowing itself to wreak havoc on Slaughter Race, something which Ralph didn't expect. As such, Slaughter Race is forced to be shut down and rebooted, and Arthur is presumed to be deleted.

A guilty Ralph confesses his actions to Vanellope, who angrily breaks up her friendship with him as a result, much to his discomfort. Having survived the shutdown, Arthur secretly spots Ralph and scans his insecurities over the loss of his friendship with Vanellope.

Taking the opportunity, Arthur duplicated itself into countless clones of Ralph, scourging the Internet in a rampant search for Vanellope and breaking off people's connections in the process. Upon realizing what's happening, a remorseful Ralph decided to take action by luring the Ralph clones into an antivirus software (with the help from Vanellope, Knows-More and Yesss).

Unfortunately, Arthur caught wind of this and assimilates the Ralph clones into itself, growing into a gigantic version of Ralph to capture Vanellope and climb up to Google Tower to keep her there. Ralph tries to stop Arthur from doing any further damage, but this only incites an angry Arthur to grab Ralph, intending to crush him to death with its fist. However, Vanellope begs Arthur to spare Ralph by promising to be its friend.

Before Vanellope could submit herself to Arthur, Ralph calls out Arthur for its selfish possessiveness towards Vanellope, and that it would be best for himself to let Vanellope make her own decisions. This revelation is what touched Arthur to finally let Vanellope go and reconcile her friendship with Ralph, thus resolving Ralph's insecurities for good.

With Ralph's insecurities finally resolved, Arthur (with a genuine smile) accepts its fate of being deleted from the Internet, exploding into a bright light before dissipating from existence. Ralph would later be rescued by Spamley and the Disney Princesses, and the Internet is rebooted back to its normal state.

Appearance
In its normal form, Arthur resembles a black leech-like creature with a large glowing eye. After revealing its secondary form, Arthur takes on the appearance of a gargantuan Ralph made entirely of Ralph clones.

Powers and Abilities
As an insecurity virus, Arthur was able to scan any living object for any weakness that it can exploit and spread out to wreak havoc. Thus was shown when it scanned Vanellope for her glitching abilities and exploited them to lay siege in Slaughter Race.

After scanning Ralph's insecurities over losing Vanellope, Arthur was able to assimilate into hundreds of Ralph clones, The clones then mention the word "friend" simultaneously as their goal to have Vanellope. The clones destroy the Internet as viruses, and later into a giant version of Ralph, in hopes of crashing the Internet and having Vanellope to itself. It even proved to be extremely strong as it was able to tear down buildings on the Internet, even easily capturing Ralph and almost trying to kill him if Vanellope hadn't interfered.

Trivia

 * Arthur is one of the rare sequel villains to actually appear in the Disney animated canon, the others are Percival C. McLeach from The Rescuers Down Under and Firebird from Fantasia 2000.
 * Ironically, an antivirus program named B.E.V. was planned to be the main antagonist of the film, but she was cut from the film in favor of using Ralph's insecurities (in the form of Arthur) as the main antagonist. However. B.E.V. appeared as the main antagonist of the new theme park ride known as Ralph Breaks VR, as she intends to delete Ralph and Vanellope from the Internet, believing them to be imperfections.