After discovering a mechanical worker who always smiles, Monster worries that he may no longer be the happiest guy in the world.
Gary Conrad
Director, Storyboard Artist
Joshua Sternin
Writer
Jennifer Ventimilia
Peter Ferk
Storyboard Artist
Curtis Armstrong
Robot DeFault / Marf (voice)
Harland Williams
Monster Krumholtz (voice)
Maurice LaMarche
Gart / Perry / Loudmouth (voice)
Jonathan Slavin
Ogo (voice)
Megan Hilty
J.D. (voice)
Cree Summer
Spitfire / Globitha (voice)
Rhea Perlman
Nessie (voice)
Fred Tatasciore
Punch Morley (voice)
Kurtwood Smith
Mr. Wheelie (voice)
Ping Wu
Master Grabmirist (voice)
Nolan North
Hal Worth-a-ton / Uncle Kuffley / Crikey (voice)