Doraemon: The Record of Nobita, Spaceblazer

Nobita keeps having a strange dream about a boy named Roppel and his odd companion Chami traveling through space. By chance, he meets them in real life and learns they are actually being chased by enemies, which caused their spaceship to malfunction-linking it directly to Nobita’s room. Together, they travel to Roppel’s planet, where Nobita and Doraemon promise to help free his world from its oppressors, all while enjoying their adventure.