Monsters

Monsters are the creatures featured in Aaahh!!! Real Monsters. According to Attack of the Blobs there are multiple species of monster.

Biology

Physiology

Monsters have a seemingly unlimited variance in appearance, although ones who are related may share similar traits. Relative to humans monsters are fairly small, averaging around 1–3 feet in height. Monsters' bodies are extremely pliable and are capable of expanding to several times their original size or squeezing through small pipes with proper training.

Reproduction

Monster reproduction is a seemingly elaborate ritual involving placing the elbow on the knee, putting the thumb on the nose and waving the hand, ending with touching fingertips and forming a blob which hatches into a bonsty 30 days later.

Physical Development

While little is known about monsters' physical development beyond the earliest stages, it seems likely that they experience rapid development early in life which slows down when they reach adolescence. Aging from adolescence through late adulthood seems to progress very slowly, lasting hundreds of years. Aging may then speed up again when monsters reach old age. This would explain the extremely low numbers of juvenile and elderly monsters relative to adolescents and adults.

Weaknesses

Monsters cannot survive in the oxygen-rich human world without first filling their breathing sacks with putrid air. Exposure to perfumes and air fresheners can incapacitate monsters and cause Nolox.

As shown in Garbage In, Garbage Out, monsters are extremely susceptible to starvation, and will begin to waste away after only a few days without food.

Diet

Monsters primarily eat garbage, and are shown to be capable on injecting almost anything from insects to metal. Monsters also sometimes eat other monsters, as seen in Monsters, Get Real!

Language

The Gromble, Shroink, and Oblina have been heard speaking incomprehensible gibberish that may actually be a monster language. Monsters also their own unique terminology for many things, see: Monsters/Terminology.

Minor and Unnamed Monsters

The following monster characters are unnamed and/or only have minor appearances in the episodes in which they appear. Note: several names on this list come from the class list seen in Monsters Are Fun and seating chart from The Master Monster.

Name	Description
#13	Appears in Snorched If You Do, Snorched If You Don't in the snorch chamber waiting room sitting next to Kriggle before being called into the The Snorch's Chamber.
#20	Appears in Snorched If You Do, Snorched If You Don't in the snorch chamber waiting room where Ickis tries to cut behind him. Has a tall head with three mouths. Voiced by Ron Fassler
3-Eyes	Appears in Curse of the Krumm, mocks Krumm for being a crossing guard. Bears a strong resemblance to Stazula. Voiced by Loren Lester
Basketball Monster	Appears in Smile and Say Oblina, round orange monster resembling—and used as—a basketball. Has a single eye, human-like ears, wide mouth with exposed fangs, and two small legs.
Basketball-Playing Monster	Appear in Smile and Say Oblina. Two monsters wearing jerseys and white pants. They are only seen in the establishing shot of the game.
Betting Monsters	Appear in The Great Wave, placing and taking bets on the race. The monster taking the bets is tall and teal with six arms. In addition to several reoccurring monsters there are three more monsters only appearing in this scene. Monster 1 (seen only from back): Grey with rounded ractangular body and bulbous hands with claws. Places a bet of five tonails on Krum. Likely voiced by Rodney Saulsberry. Monster 2 (seen only from back): Yellow monster with large head and a single horn. may be the "Monster 2" who bets eight worms and a leech on Krum voiced by Tazia Valenza, although this line may have been ment to come from Dizzle or Stazula. Monster 3: Tall round peach-colored monster with stubby limbs, purple lips, and small eyes. Places a bet of fifteen maggots on Ickis... to lose. Likely voiced by Gregg Berger.
Camera Monster	Appers in The Great Wave. Purple monster who wears a helment which presumably acts as a remote transmitter to the viewfinder to broadcast the Great Wave Race. Seen only from behind.
Cheerleader Monster	Appears in Smile and Say Oblina cheerleading at the game with Horrifica, Dizzle, and Harryette. Has an appearance similar to Splazu but with a smooth, wide body and large, sturdy legs. The role of "Cheerleader" is credited to Charlie Adler, Christine Cavanaugh, and Angel Harper.
Danka	Danka is a blue monster with red lips, and eyes and mouth on stalks. She sits in the back row of the lexture hall next to Snav
Dazumbie Pink Slug-Eyed Monster	Dazumbie has a single eye, big nose, and mustache. Pink Slug-Eyed Monster is pink with thick eyestalks. It is also the only regular background monster whose name does not appear on The Gromble's class ranking chart in Monsters Are Fun and cannot be seen on the class seating chart in The Master Monster.
Doybu Izzith	Often seen in backgrounds, Doybu appears similar to Snill, but green with long legs. Izzith has four legs and a long nose.
Geometric Monster	Seen in Mother, May I among the students laughing at The Gromble sitting next to Danka. Pink with an odly angular head.
Jack-o'-lantern Monster Round Purple Monster	Both seen only briefly in the first monster scene of The Switching Hour.
Jump Rope Monster	Appears in The Great Wave. Very large green monster with yellow eyes, a chin beard, powerfull legs, dorsal spines, and a long tail that Ickis uses as a jump rope while training for the Great Wave Race. This monster's body is never fully seen.
Nerdy Monster	Appears in The Great Wave. Comes with Slickis to watch the Great Wave Race. Bears an extremely strong resemblance—and is presumably related—to both Ickis and Slickis but is distinguished by a tall, narrow head, wiry mustache, and perpetually oozing ears.  Voiced by David Eccles
Ocka	Ocka is a long-necked yellow monster.
Offended Monster	Appears in Attack of the Blobs, is very offended—to the point of spraying liquid out of her nose—by Ickis making what are assumed to be gestures used in monster mating.
Korga Red-Eye Tusked Monster	Appear in backgrounds starting with The Switching Hour. Korga usually sits in the back row of the middle-left column of the Lecture Hall. Red-Eye Tusked Monster sits in the back row of the middle-right column.
Pencil-Headed Monster	Appears in The Switching Hour. Has a pencil-shaped head what it uses to write on its flesh, which can then be torn off like paper.
Running Nose Monster	Appears in Monsters, Get Real!/Pilot. Gag monster whose nose is literally running away. Running Nose Monster was eaten by The Gromble.
Scoreboard Monsters	Appear in Smile and Say Oblina, two pink-colored monsters who keep score during the game. One bears a resemblance to Tamfo, but is likely not him, as Tamfo is playing in the game.
Shroink	According to the Gromble's class ranking chart, Shroink is the name of the monster with two faces who sits in front of Ickis. Shroink has a fae on each side or its rotating head. One face has masculine features and voice, and the other feminine.
Splazu	Blue monster with red eyes and purple pumps. Appears in many episodes, often seen in the second row of the middle-left column of the Lecture Hall.
Spoop	Spoop is a pink monster with two tufts of blue hair.
Swamwump	Swamwump is a purple monster who wears a big collar and has a mustache.
Tamfo Uwapo	Tamfo has an appearance very similar to Snill, but red in color. Where Have All the Monsters Gone? suggests they may be part of a sub-group of monsters called trolls. Uwapo is a round brown monster.
Triangle Monster	Seen only briefly and at a distance in The Switching Hour. May be Running Nose Monster's Nose.
Vendor	A monster with a british accent who appears in The Great Wave selling such things as slugs, worms, and slime-coated leeches. The vendor is voiced by Tim Curry
Whistle Monsters	Whistle monsters are monsters that serve the function of whistles. Krumm uses a whistle monster in Curse of the Krumm while working as a crossing guard. Another whistle monster is seen during the basketball game in Smile and Say Oblina, and again used by Ickis in Things That Go Bump.
Zooeuh	Zooeuh is a purple monster with three tufts of blue hair.

Unknown Credited Monsters

The following monster characters appear in the credits of an episode, but have not been linked to a specific character.