Night on the Galactic Railroad(1985)

Overview:

Lonely and awkward, Giovanni struggles with his sick mother, absent father, and an afterschool job that isolates him from his peers. But on the night of the Festival of Stars, he is magically transported onto a celestial train with his only friend, Campanella. Together, they embark on an extraordinary journey through the galaxy, encountering mysterious characters and grappling with life's deepest questions.