As the film reaches its climax, Arthur (played by Freddie Highmore), a young boy, along with his new friends, the Minimoys, have embarked on a perilous journey to find treasure and save his grandfather’s home from being demolished. They have encountered numerous obstacles, battled against the villainous Maltazard (played by David Bowie), and navigated through the miniature world of the Minimoys.
In the final act, Arthur and his companions finally locate the treasure, which holds the key to saving his grandfather’s house. However, Maltazard, the film’s antagonist, is determined to seize the treasure for himself and continues to pursue Arthur relentlessly.
In a climactic showdown, Arthur confronts Maltazard and his army of insect-like creatures in a tense battle. With the help of his loyal friends, including Princess Selenia (voiced by Madonna) and her brother Betameche (voiced by Jimmy Fallon), Arthur manages to outsmart Maltazard and secure the treasure.
As Arthur retrieves the treasure, he discovers a magical elixir that can restore his grandfather (played by Mia Farrow) to his normal size. With this newfound knowledge, Arthur rushes back to his grandfather’s house, where he successfully administers the elixir, saving his grandfather and preserving their home.
The film ends on a triumphant note, with Arthur and his family celebrating their victory and the newfound unity between the human world and the realm of the Minimoys. Arthur’s bravery and determination have not only saved his grandfather’s house but also forged lasting friendships and brought about peace in the magical world of the Minimoys.