It's the Pied Piper, Charlie Brown 2000
"Here come the mice!"
Overview
Based on the legend of the Pied Piper, it stars Snoopy as the title character, who tries to rid the Peanuts' gang's hometown of mice by playing his concertina, in return for a year's supply of dog food.
Director: Bill Melendez
Cast
Quinn Beswick
Charlie Brown (voice)
Ashley Edner
Sally Brown (voice)
Rachel Davey
Lucy (voice)
Frank Welker
The Mayor (voice)
Neil Ross
Interviewer (voice)
Pat Musick
First Woman (voice)
Joan Van Ark
Secretary (voice)
Bill Melendez
Snoopy / Woodstock (voice)