Kaettekita Dr. Slump: Arale-chan Special
Dr. Slump Arale-chan Returns Special ／ 帰って来たDr.スランプ アラレちゃんスペシャル
Description
This is the last episode (243), and the 4th movie, “The Treasure of Nanaba Castle” with a wraparound plot of new material, including an older Turbo and the wedding of Tsukutsun and Akane. (Source: AniDB)