Arthur the Insecurity Virus (also known as the Wreck-It Ralph Virus or Ralphzilla) is the main antagonist of Disney's 57th full-length animated film Ralph Breaks the Internet.
He is an insecurity computer virus that was made to duplicate and spread throughout everywhere that is to be infected, the twist being that Ralph himself is the reason behind his depraved nature.
In his original form, he was voiced by John DiMaggio. Through clones of Ralph, he was voiced by John C. Reilly, who also played the original Ralph.
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Arthur as the Wreck-It Ralph Clone
Arthur as Ralphzilla