Ben Diskin
Numbuh 1 / Numbuh 2 (voice) (23 eps)
Lauren Tom
Numbuh 3 (voice) (23 eps)
Dee Bradley Baker
Numbuh 4 (voice) (23 eps)
Cree Summer
Numbuh 5 (voice) (23 eps)
Jennifer Hale
Numbuh 86 / Nurse Claiborne / Rainbow Monkey Chorus (voice) (6 eps)
Jason Harris
Commander (voice) (4 eps)
Tom Kenny
(voice) (4 eps)
Rachael MacFarlane
(voice) (3 eps)
Jeff Bennett
(voice) (3 eps)
Daran Norris
(voice) (3 eps)
Mark Hamill
Stickybeard / Sumo Wrestler / Pirate (voice) (2 eps)
Frank Welker
Rainbow Monkey Kong (voice) (2 eps)
Tara Strong
Sally Sanban (voice) (2 eps)
Rob Paulsen
(voice) (1 eps)
James Arnold Taylor
King Sandy / Knight #2 / Guard #1 (voice) (1 eps)
Candi Milo
Madame Margaret (voice) (1 eps)