Oswald: Down The Rabbit Hole (1970)

Art and some of his closest friends help track down his long-lost family lineage. When they find his Great-Grandpa Oswald’s abandoned home, they end up getting transported to a place lost in time, shrouded by dark Hollywood Magic. The group finds they are not alone when Oswald’s come-to-life cartoon Rabbit, a dark entity, decides their lives belong to it. Art and his friends must work together to escape their magical prison before the Rabbit gets to them first.