My favorite Peanuts ripoff is a ditty from Jeff Gilbert's "Brain Pain" circa 1989 or so:

    kids: Trick or treat!
    kid 1: I got a popcorn ball!
    kid 2: I got a fudge ball!
    kid 3: I got a pack of gum!
    Charlie Brown: I gotta rock!
    <heavy metal ensues>

Gawd I miss Jeff Gilbert's show. He should have been syndicated nationally, rather than just a local thing.