Arthur's Mountain Adventure

Arthur's Mountain Adventure is a 2009 American made-for-television animated comedy-drama fantasy film based on the PBS series Arthur, itself based on a children's book series of the same name by Marc Brown. It was directed by Alex Zamm and produced by 9 Story Media Group. The film focuses on the Read family taking a vacation to the Yukon, with the titular character being written as a rebellious 10 year old.

Plot
Jane and David Read and their children DW, and Kate are preparing for a summer family vacation to the Yukon in Canada. After DW catches him disobeying his parents to try and sneak out to a PG-13 movie with his friends, Arthur is forced to go on the trip as well. There, the family learns about the history of the Yukon and how important it is to preserve our natural resources. Arthur is given a magic coin that allows the user to make one wish by a tour guide during their trip.

Later at the resort where they're staying, Arthur is caught bullying DW, which results in his father grounding him for the rest of the summer. In a fit of rage, Arthur wishes that he didn't have sisters and that his parents had never met. The magic coin he had in his hand grants his wish and as a result his family do not remember each other or him.

Arthur and his friend Buster (who is later found to have visited the Yukon as well) attempt to get the coin from the tour guide, but he catches them; he is shown to be a wizard, as he has not had to give them up. The guide asks him what would happen if a kid wished that their family never met; He explains they would gradually forget their past before disappearing forever. He says it would take a miracle to fix it, leading guide to mention the Stone of Dreams, which he says would work too.

Eventually, Arthur and Buster succeed in finding the Stone of Dreams. He tells David, Jane, and DW his story. Jane doesn't believe him, believing she would not forget her children. Buster mentions that if they were wizards like their tour guide was, they might be able to cast a spell to reverse it. DW finally loses all of her memories and is sucked into a vortex of non-existence. Jane remembers her, realizing that they were telling the truth.

In a state of worry, they turn to DW for help. However, by now DW has lost all her memory; Arthur tells her that even though they pick on each other, she looks up to him and begs DW not leave him here alone.

Arthur wishes that everything would go back to the way it was. Time rewinds to just before Arthur makes the wish that his family did not exist, where he apologizes for his attitude and accepts his severe punishment with grace. After lovingly meeting up with his sisters again, the family happily strolls along the mountain resort once more.

Transcript
Arthur's Mountain Adventure/Transcript