Maltazard, the Evil M, is now 7 feet tall and evolving among the humans, causing terror wherever he goes. His goal is simple: forming an army of giant henchmen and ruling over the universe. Meanwhile, Arthur is still a Minimoy, and thus in a state where he's unable to fend him off. With the help of Selenia and Betameche, he hatches a plan to regain his usual size: all they must do is infiltrate Arthur's house through the pipeworks, catch an electric train from his bedroom to his grandfather's study and find an elixir that will make him grow back to his human size. Sounds simple enough, if it weren't for Darkos, Maltazard's own son, hot on their tails.
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Arthur 3: The War of the Two Worlds (French: Arthur 3 : La Guerre des deux mondes) is a 2010 English-language French fantasy animated/live-action directed and co-written by Luc Besson. It is based on the fourth book of the Arthur children's books series by Besson. It is the sequel to Arthur and the Revenge of Maltazard (2009) and the third installment in the Arthur film series. The film was shot back-to-back with the previous installment.
Arthur 3: The War of the Two Worlds was released theatrically in France on 13 October 2010 by EuropaCorp. The film received mixed reviews from critics and was a box-office success in France. However, following its two predecessor's under-performance at the box-office internationally, the film generated huge losses for EuropaCorp.It is the last installment in the main series. A spin-off, Arthur, malédiction, is scheduled to be released in France in 2022.