NormalThese episodes are basically set in our world, but a more cartoony version of it. For instance, anthropomorphic animals might exist, characters might have disproportionate bodies and/or weird-coloured hair or fur, and devices might work a little differently than their real-world counterparts, but it's otherwise just like our world.
Normal characters (note, these can appear in an episode of any type and not change the genre):
- The Pirates (borderline, but pirates do exist in real life)
- The Pirates' Parrot
- The Teens
- Peg's mother
- The farmer
- The Neighbour Ladies
- The 100 Chickens
- Mrs. Sheep
- Baby Fox
- Blue-Striped Bird
- The Pig
- The Cow
- The Toad
- "The Chicken Problem"
- "The Roxanne Problem"
- "The Tree Problem"
- "Another Tree Problem"
- "The Parade Problem"
- "The Mega Mall Problem"
- "Yet Another Tree Problem"
- "The Big Dog Problem"
- "The Three Friends Problem"
- "The Butter Problem"
- "The Roxanne Problem"
Sci-fiThese episodes involve things like aliens and futuristic technology (not just unusual versions of existing technology such as Ramone's pebble-powered plane) and might be set in outer-space. If an episode is set on Earth, but has an alien in it, the alien must have a prominent role and its being an alien must be a plot point. Otherwise, it's unsorted (see below)
- Big Mouth
- "The Space Creature Problem" (set in space, features aliens and spaceships)
- "The Doohickey Problem" (also set in space and featuring aliens and spaceships)
- "The Potty Problem" (while set on Earth, Big Mouth is a prominent character and the main source of conflict is that he's an alien and therefore doesn't know how to use bathrooms)
FantasyEpisodes which either take place in a generic fantasy world with things like dragons and mermaids, or the universe of one or several fairy tales or (in Romeo and Juliet's case) Shakesperean plays.
- The Mermaid
- The Three Bears
- Pig's brothers (since together, they make the Three Little Pigs)
- The Giants
- The Three Billy Goats Gruff
- "The Golden Pyramid Problem" (generic fantasy setting, features the mermaid and a dragon)
- "The Three Bears Problem" (features the bears, the pigs, and the billy goats as protagonists)
- "The Giant Problem" (takes place up the beanstalk, features many fairy tale characters)
HistoricalEpisodes set in the past, or prominently featuring characters from the past. It could be as far into the past as dinosaur times, or as recent as the twentieth century.
- Albert Einstein
- Ludwig van Beethoven
- The Dinosaurs
- "The Dinosaur Problem" (set in dinosaur times)
- "The Beethoven Problem" (set in 1808)
- "The Cleopatra Problem" (set in Ancient Egypt)
UnsortedThese episodes don't really have a defined genre. They might play out like a normal episode but with a brief appearance from an alien, character from the past, or fantasy character. It might border on sci-fi by having a futuristic piece of technology but otherwise be a normal episode, or feature an alien but its being an alien isn't a plot point. There might also be a whole mishmash of different characters from different genres.
- "The Messy Room Problem" (mostly normal, but with a brief appearance from Big Mouth)
- "The Birthday Cake Problem" (mostly normal but features Beethoven, the dinosaurs, and two aliens as background characters)
- "The Honey Problem" (mostly normal, but features the Giants as background characters and features a high-fi device)
- "The Baby Problem" (mostly normal but features a high-tech device)
- "The Halloween Problem" (Richard is a protagonist, but his being an alien isn't a major plot point.)
- "The George Washington Problem" (mainly a historical episode set in the year 1776, but Big Mouth, another alien, and the Baby T-Rex also feature)
- "The Allergy Problem" (mainly a normal episode, but Einstein and Marie Curie crop up at the end.)
- "I Do What I Can: the Musical" (mostly a normal episode, but the mermaid and Big Mouth play minor roles)
- "The Girl Group Problem" (features dinosaurs, Cleopatra, and Romeo and Juliet in equal amounts)