Freddy Krueger is the main character of the Nightmare On Elm Street films. In life, the film imagines he was a child murderer, until the parents of his victims burned him alive, which would later lead to him coming back to life and getting his bloody revenge on them.
Dokken is a rock band from the 80s. They're best known for their song "Dream Warriors", which is featured in the Nightmare On Elm Street sequel "Dream Warriors".
Like all Zombie stories it's silly but silly stories can be frightening.