It's Flashbeagle, Charlie Brown(1984)

Brett Johnson

Charlie Brown (voice)

Fergie

Sally Brown (voice)

Gini Holtzman

Peppermint Patty (voice)

Keri Houlihan

Marcie (voice)

Jeremy Schoenberg

Linus van Pelt (voice) (uncredited)

Heather Stoneman

Lucy van Pelt (voice) (uncredited)

Gary Goren

Schroeder / Tommy, the kid (voice)

Bill Melendez

Snoopy / Woodstock (voice)

Desiree Goyette

Vocals by (voice)

Joey Scarbury

Vocals by (voice)

Kevin Brando

Vocals by (Schroeder) (voice)

Joe Chemay

Vocals by (voice)

Brad Kesten

Vocals by (Charlie Brown) (voice)

David Wagner

Vocals by (Linus van Pelt) (voice)

Jessica Lee Smith

Vocals by (Lucy van Pelt) (voice)