Guest Stars Jane Lynch voices Donna Melissa Fumero voices Sophie Russell Peters voices Aman Sarayu Blue voices Diya Frank Welker voices William Kulap Vilaysack voices Lola Sara Ramírez voices Amber Debby Ryan voices Krista Shay Mitchell voices Brenda Vanessa Williams voices Dr. Perdue Stephen Root voices Merle Cogburn Gary Anthony Williams voices Don Kari Wahlgren voices Evelyn Jennifer Hale voices Thorn Jason Mantzoukas voices Scrappy Kari Wahlgren voices Female News Anchor Melissa Fumero voices Uncle Scoobi Piotr Michael voices Board Member Piotr Michael voices Lion Tamer Winsome Brown voices Female Librarian