It's the Pied Piper, Charlie Brown (2000)

Here come the mice!

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.

Production

United Media Productions · Lee Mendelson Film Productions · Charles M. Schulz Creative Associates · Bill Melendez Productions