This list is for characters who only appear in 3-2-1 Penguins!, listed in chronological order.
Mr. and Mrs. Conrad
Mr. and Mrs. Conrad are the parents of Jason and Michelle. They send their kids to Grandmum because they're going on a business trip, according to Ron Smith.
They were only seen in Trouble on Planet Wait-Your-Turn, though they're mentioned a few times in later episodes.
Voice Actors
English
- Pamela Thomas (Mrs. Conrad)
- Ron Wells (Mr. Conrad)
International
- Maryam Hosni (Mrs. Conrad; Arabic dub)
Fun Facts
- They're the only human adults besides Grandmum to be in the series.
- When Warner Home Video distributed Trouble on Planet Wait-Your-Turn for the mass market, they redubbed Grandmum's lines with Kymberly Mellen, but not Mrs. Conrad's, despite both being voiced by Thomas in the original release.
The Bandicoot King
The Bandicoot King is one of the kings in Space Base Bullamanka.
He first appeared in The Cheating Scales of Bullamanka and appeared as a background character in The Comet Lounge ever since.
Voice Actors
- Keith Lango
- Akram Halim (Arabic dub, The Cheating Scales of Bullamanka)
Cowboy Alien
This alien is yellow and wears cowboy attire. He speaks with a Western accent. He is frequently seen in the Comet Lounge in various episodes.
He appeared in Fair and Square, The Shinin' Star Swing!, Space Surfin' Superstar!, The Doom Funnel Rescue!, Spaceship Drivin' Man, The Legend of Galaxy Gus,I Scream, You Scream!, Lazy Daze, Practical Hoax, Comedy of Errors, Wiki Tiki, Invasion of the Body Swappers!, Hogs and Kisses, and Kennel Club Blues.
Voice Actors
English
- Ron Smith (Season 1 only)
- Garry Chalk (Kennel Club Blues only)
International
- Akram Halim (Arabic dub, Kennel Club Blues)
- Xavier Coronel (Latin Spanish dub, Kennel Club Blues)
Squid Girl
Squid Girl is a pink humanoid alien. She mostly often appears in The Comet Lounge.
Voice Actress
- Tracy Johnson (Runaway Pride at Lightstation Kilowatt only)
Fun Facts
- Her name was never mentioned in the show, but it has been revealed in concept art.
Trevor
Trevor is a close friend to Jason.
Voice Actors
- Tracy Johnson
- Ehab Sobhy (Arabic dub)
Barthos
Barthos is a sheep from Planet Picket.
He was the judge of the meeting over which side has the greenest grass.
He only appeared in The Green-Eyed Monster.
Fun Facts
- He is the only inhabitant to be both bluish and pinkish in color.
Flam Mingo
Flam Mingo is a lawn flamingo from Planet Sharalike.
The lawn gnomes declared war on him and the lawn flamingoes.
He only appeared in Give and Let Give.
Voice Actors
- Trevor Devall
- Akram Halim (Arabic dub)
- Tomás Doval (Latin Spanish dub)
Jeff
Jeff is a lawn gnome from Planet Sharalike.
He declared war on the lawn flamingoes.
He first appeared in Give and Let Give and appeared as a background character ever since.
Voice Actors
- Lee Tockar
- Akram Halim (Arabic dub)
- Eduardo Wasveiler (Latin Spanish dub)
Fun Facts
- His real name is Nutty Mcfluffyplants.
Gordon Shtick
Gordon Shtick is a yellow stick figure-like alien who is a comedian.
He offered Jason a chance to perform at the Comedy Hole in Sector 12 after he saw his stand-up act. Later on, when he found out Jason's embarrassing secret, he reassures him that he won't tell anyone.
He only appeared in Comedy of Errors.
Voice Actors
- Paul Dobson
- Eduardo Wasveiler (Latin Spanish dub)
Fun Facts
- Although he is a comedian in Sector 12, it's unspecified whether he is a comedian in the Comet Lounge.
Miso Guapo
Miso Guapo is a pink lobster-like alien who is the host of the Miso Guapo Convention in Sector 9.
He only appeared in Invasion of the Body Swappers!
Voice Actors
- Paul Dobson
- Akram Halim (Arabic dub)
- Tomás Doval (Latin Spanish dub)
Fun Facts
- Cedric Hohnstadt designed him as a George Hamilton-type of alien.
- His name is a pun. "Guapo" is Spanish for "handsome". Therefore, "Miso Guapo" basically means, "Me so handsome".
Future Midgel
Future Midgel is Midgel's future self.
He, along with Future Fidgel and Future Zidgel, tried to give advice to their past selves, only for their advice to be ignored.
He only appeared in Wise Guys.
Voice Actors
English
International
- Reda Fawzy (Arabic dub)
- Antonín Navrátil (Czech dub)
- Larry Villanueva (Latin Spanish dub)
Future Fidgel
Future Fidgel is Fidgel's future self.
He, along with Future Midgel and Future Zidgel, tried to give advice to their past selves, only for their advice to be ignored.
He only appeared in Wise Guys.
Voice Actors
English
International
- Akram Halim (Arabic dub)
- Jakub Saic (Czech dub)
- Manolo Coego (Latin Spanish dub)
Future Zidgel
Future Zidgel is Zidgel's future self.
Like Future Midgel and Future Fidgel, he tried to give advice to their past selves, but his advice was more obvious.
He only appeared in Wise Guys.
Voice Actors
English
International
- Fadi Atef (Arabic dub)
- Libor Terš (Czech dub)
- Gonzalo Rodríguez (Latin Spanish dub)
Admiral Sowmaster and Cash
Admiral Sowmaster and Cash are pig-like aliens in charge of the Pig-O-Bank Cruiser.
They only appeared in Hogs and Kisses.
Voice Actors
English
- Paul Dobson (Admiral Sowmaster)
- Unknown (Cash)
International
- Xavier Coronel (Admiral Sowmaster; Latin Spanish dub)
- Unknown (Cash; Latin Spanish dub)
Fun Facts
- Sowmaster is based after Edward G. Robinson.
- Concept artist Cedric Hohnstadt stated that Sowmaster was tall, while his assistant was short. This was changed by Tom Bancroft.
- Sowmaster's hat has a similar design to Pa Grape's pirate hat (particularly its early design from Very Silly Songs! and The Ultimate Silly Song Countdown), although the pirate insignia is replaced with a gold dollar sign.
Gizmoid
Gizmoid is a robotic fox.
He only appeared in 12 Angry Hens.
Voice Actors
- Sam Vincent
- Akram Halim (Arabic dub)
- Orlando Noguera (Latin Spanish dub)
Fun Facts
- Even though he's based on a fox, his mouth moves more like a beak.
- His voice is reminisces to to Edd/Double D from "Ed, Edd n Eddy", a character Sam voiced before.
Old Robotic Scarecrow
The robotic scarecrow stands on a small asteroid with stocks of corn around him.
When the Rockhopper crew was trying to find Cavitus who stole the Royal Egg, they found a robotic scarecrow who tries to point them where they went. Michelle immediately thought they should go left, but Fidgel said to wait and see if he's actually pointing the right direction.
He only appeared in 12 Angry Hens.
The Emperor of Planet Kennel
The Emperor of Planet Kennel is a purple dog-like alien who owns many cato'pillows.
He only appeared in Kennel Club Blues.
Voice Actors
- Garry Chalk
- Akram Halim (Arabic dub)
- Tomás Doval (Latin Spanish dub)
Fuzzy
Fuzzy is a pink sock monkey who promised to keep her finger in the hole in the dam.
She only appeared in Promises, Promises.
Voice Actress
Fun Facts
- She speaks with a Scottish accent.
Cow Commander
The Cow Commander referred as Bessie by Zidgel, is the leader of the alien cows.
She contacted the Rockhopper.
She only appeared in In the Big House.
Voice Actresses
- Ellen Kennedy
- Heba Attia (Arabic dub)
The Mayor
The Mayor is the mayor of Planet-Cross-Your-Heart and the father of Fuzzy. He only appears in Promises Promises.
Voice Actor
Fun Facts
- Like Fuzzy, the Mayor speaks with a Scottish accent.
Gator King
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The Gator King is a character that first appears in the episode Oh Mercy!, where Jason and Zidgel were sent on a mission to deliver an emerald but ended up dropping it, and shattering into pieces, then the Gator King locks him in his dungeon room forever. Jason then tells him the errors of his ways but he still refuses to set Zidgel free.
Voice Actors
- Paul Dobson
- Akram Halim (Arabic dub)
- Eduardo Wasveiler (Latin Spanish dub)
Fun Facts
- His voice and mannerisms, as well as his clothes, are based off of the late Elvis Presley.
Ice Cream Serving Robot
The Ice Cream Serving Robot is a Soda Jerk who works in The Fabulous Comet Lounge. He only appeared in the song "Fair and Square".
Voice Actor
- TBA
Fun Facts
- He is Modeled after Jimmy Gourd's Clothing who worked in Jimmy Gourd's Ice Cream Parlor in The End of Silliness?