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PLOT----------
Nobita has been having a weird dream about a boy named Roppel and his strange companion Chami traveling in space. によって a twist of fate, he met them in person where it turns out that they are real and that they were being pursued in space, causing their 宇宙 vehicle to malfunction, connecting the 宇宙 vehicle itself with Nobita's room. They journeyed to Roppel's planet and amidst their enjoyment, Nobita and ドラえもん pledged to help Roppel's planet free from their oppressors.