Addams Family Values (1993)

The Addams Family must rescue their beloved Uncle Fester from Debbie, a black widow serial killer, who plans to marry him for his wealth and then murder him. Meanwhile, Wednesday and Pugsley are sent to a summer camp where they make enemies with the snobby camp owners and befriend a misfit named Joel. With the help of Joel, they uncover Debbie's true identity and attempt to stop Fester's wedding. After a series of comedic and macabre events, the Addams Family successfully save Fester and defeat Debbie.