Arthur (Wreck-It Ralph)

Arthur is a major character in Disney's 2018 animated feature film Ralph Breaks the Internet. It is an insecurity virus created by Double Dan to disseminate any infection around the internet.

Appearance
Arthur resembles a black leech-like creature with a glowing red eye and a dark cloud around its body.

Powers and Abilities
Arthur is able to scan any unstable code within any digital being, then copy and transmit it throughout the area. This ability is not limited to the physical composition of the target, as Arthur can even scan the target's emotional insecurities, as it scanned Ralph's grief over losing Vanellope; however, the products of its viral proliferation depends on the error in question, given that scanning Vanellope's deteriorating glitch destabilized the structure of Slaughter Race while scanning an emotional Ralph generated hundreds of Ralph clones that embodied his negative traits.