A Scooby-Doo Halloween (2003)

Originally aired October 25, 2003. The gang visits Velma's relatives during a Halloween festival headlined by KISS, but the festivities are interrupted by the ghost of the town's founder and a bevy of living scarecrows. (Synopsis from IMDB.com)

The Paul Lynde Halloween Special (1976)

Originally aired October 29, 1976. Witchipoo and the Wicked Witch of the West give Paul Lynde three wishes for Halloween.

Kiss Meets the Phantom of the Park (1978)

Originally aired October 28, 1978, and released in theaters outside the U.S. as Attack of the Phantoms the following year. Anthony Zerbe appears in this made-for-TV movie as an evil inventor working at an amusement park. He also appeared in Child of Glass, another 1978 made-for-TV film. NBC bumper: Movie:

Phantom of the Park Movie from some random person on Vimeo.