Doraemon: Doraemon Comes Back (Movie)

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Nobita is running from an angry Gian, though is quickly able to escape when Gian trips. Nobita asks Doraemon for a gadget to fight back, but Doraemon instead snaps at him; Doraemon tells Nobita that he must return to the 22nd century, and won’t be returning. (Source: Doraemon Wiki)