S1E50 · Épisode 50

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)

Leon Thomas III

Monster's Singing Voice (voice)

Kari Wahlgren

Robo Ono (voice)

Greg Cipes

Vapid Milquetoast (voice)

Jeff Bennett

Snap Winsome (voice)