Poorly written comic-reliefs

A Comic Relief is the inclusion of a humorous character, scene, or witty dialogue in an otherwise serious work, often to relieve tension. Comic relief usually means a releasing of emotional or other tension resulting from a comic episode interposed in the midst of serious or tragic elements in a drama. Comic relief often takes the form of a bumbling, wisecracking sidekick of the hero or villain in a work of fiction. A sidekick used for comic relief will usually comment on the absurdity of the hero's situation and make comments that would be inappropriate for a character who is to be taken seriously. Other characters may use comic relief as a means to irritate others or keep themselves confident.

Some Comic Reliefs can be done right and when executed to perfection, some of them can become fan favorites on the show. Take Roger from American Dad!, he is a done right version of a Comic relief, and he has become a fan favorite on the show. However, in a TV Show or a Movie, sometimes, Comic Reliefs can be considered pointless to the show or movie. Such as Jar Jar Binks from Star Wars, he served no purpose on the show, and he has received tons of negative feedback from fans of the franchise.

Most comic relief characters however are incapable of being the main stars of their own show or movies (unless that they are done right), and comic relief spin-offs like Planet Sheen learnt that the hard way.

Examples of Badly Done Comic-Reliefs

 * Aliens (Luis and The Aliens)
 * Anne Harper (Nicky, Ricky, Dicky & Dawn)
 * Bob Bobowski (SMG4 2018 only)
 * Bog King's Minions (Strange Magic)
 * Bubsy (Bubsy)
 * Burt Burtonburger (Kid vs. Kat)
 * Cat Valentine (Victorious Post Season 2, Sam & Cat)
 * Chad Amani (Chad)
 * Charlie (Thomas & Friends)
 * Cheese (Foster's Home for Imaginary Friends)
 * Cisco Ramon (The Flash)
 * Cosmo (The Fairly OddParents: Seasons 9-10)
 * Mr. Crocker (The Fairly OddParents: Seasons 9-10)
 * Devon and Cronwall (Quest for Camelot)
 * Dee Dee (Dexter's Laboratory)
 * Dodo (Ot Vinta/Jets: Heroes of the Skies)
 * Fanboy and Chum Chum (Fanboy and Chum Chum)
 * Ferdinand (Tom and Jerry: The Movie)
 * Filo (Delgo)
 * Fong the rabbit (Norm of the North: Keys to the Kingdom)
 * Francis (Super Paper Mario)
 * Gamzee Makara (Homestuck)
 * Grubber (My Little Pony: The Movie)
 * Gurio Umino (Sailor Moon; season 1)
 * Gus and Wally (Rocket Monkeys)
 * Gus Turner (RobotBoy)
 * Hi-5 (The Emoji Movie)
 * Hifumi Yamada (Danganronpa: Trigger Happy Havoc)
 * Homer Simpson (The Simpsons; Seasons 16-30)
 * Hudson Gimble (Game Shakers)
 * Jacquimo (Thumbelina (1994))
 * Jake Spidermonkey (My Gym Partner's a Monkey)
 * Jar Jar Binks (Star Wars prequel trilogy)
 * Jean-Bob (The Swan Princess)
 * Jeffy (SuperMarioLogan)
 * Keisuke Naoto (Magical Girl Site) (possibly)
 * Kevin Beckman (Ghostbusters (2016))
 * Larry Quinn (The Cat in the Hat)
 * LeFou (Beauty and the Beast (2017))
 * The Lemmings (Norm of the North)
 * Lee Dongho (The Devil's Boy)
 * Lion-O (ThunderCats Roar)
 * Master Shake (Aqua Teen Hunger Force)
 * Mater (Cars 2 only)
 * Mayor Turkey Lurkey (Chicken Little)
 * Minions (Minions only)
 * Minoru Mineta (My Hero Academia)
 * Misao Mondou (Super Sentai: Doubutsu Sentai Zyuohger)
 * Monokuma Kubs (Danganronpa V3: Killing Harmony)
 * Mr. Koontz (Alaska (1996))
 * Mr. Turner (The Fairly OddParents)
 * Ned and Zed (Planes)
 * Neelix (Star Trek: Voyager)
 * Onari Yamanouchi (Kamen Rider Ghost)
 * Patrick Star (SpongeBob SquarePants (Seasons 6-8))
 * Ruby Rhod (The Fifth Element)
 * Sanjay Patel and Craig (Sanjay and Craig)
 * Sergio (The Casagrandes)
 * Sheen Estevez (Planet Sheen)
 * Skids and Mudflap (Transformers films)
 * Slip & Slide D'Peel (Coconut Fred's Fruit Salad Island)
 * Snails (Dungeons and Dragons)
 * Sparky (The Fairly OddParents)
 * SpongeBob SquarePants (SpongeBob SquarePants (Seasons 6-8))
 * SwaySway and Buhdeuce (Breadwinners)
 * Tenko Chabashira (Danganronpa V3: Killing Harmony)
 * Terk (Tarzan (1999))
 * The Brain (Igor)
 * The Logging Locos (Thomas & Friends)
 * Tux the Penguin (Re-Animated/Out of Jimmy's Head)
 * Uncle Grandpa (Uncle Grandpa)
 * Vernon Fenwick (Teenage Mutant Ninja Turtles (2014)
 * Victor, Hugo, and Laverne (The Hunchback of Notre Dame (1996))
 * Weasel (Deadpool)
 * Yasuhiro Hagakure (Danganronpa: Trigger Happy Havoc; pre-character development)
 * Yuma Tsukimo, Bronk Stone (Yu-Gi-Oh! Zexal)
 * Zack and Deuce (The Day My Butt Went Psycho!)

Examples of Good Comic-Reliefs

 * Alebrije de la Biblioteca (Leyendas)
 * Albert "Gib" Gibson (True Lies)
 * Amethyst (Steven Universe)
 * Aoi Asahina (Danganronpa: Trigger Happy Havoc)
 * Billy (The Grim Adventures of Billy & Mandy: Seasons 1-4)
 * Bing Bong (Inside Out)
 * Bolin (Legend of Korra)
 * Brick Tamland (Anchorman: The Legend of Ron Burgundy)
 * Brooklyn T. Guy (SuperMarioLogan)
 * Bulk and Skull (Power Rangers)
 * Captain Jack Sparrow (Pirates of the Caribbean)
 * Cat (Peg + Cat)
 * Cat Valentine (Victorious: Seasons 1-2)
 * Chicken Joe (Surf's Up)
 * Cirno (Touhou Project)
 * Cogsworth (Beauty and the Beast (1991))
 * Cosmo (The Fairly OddParents: Seasons 1-8)
 * Craig the Devil (SuperMarioLogan)
 * Darbie (Just Add Magic)
 * Donald Duck (Mickey Mouse)
 * Donkey (Shrek)
 * Dory (Finding Nemo/Finding Dory)
 * Dr. Colosso (The Thundermans)
 * Dr. Drakken (Kim Possible)
 * Ducky and Bunny (Toy Story 4)
 * Dug (Up)
 * Edna Mode (The Incredibles)
 * Emile (Ratatouille)
 * Entrapta (She-Ra and the Princesses of Power)
 * Featherstone (Gnomeo and Juliet)
 * Flora, Fauna, and Merryweather (Sleeping Beauty)
 * Futaba Sakura (Persona 5)
 * Foggy Nelson (Daredevil (2003))
 * Gandhi (Clone High)
 * Genie (Aladdin (1992))
 * GIR (Invader Zim)
 * Geoffrey the Butler (The Fresh Prince of Bel-Air)
 * Gobber (How to Train Your Dragon)
 * Goofy (Mickey Mouse/Goof Troop)
 * Gundham Tanaka (Danganronpa 2: Goodbye Despair)
 * Hamm (Toy Story franchise)
 * Hammy (Over the Hedge)
 * Harry and Marv (Home Alone 1 & 2)
 * Hei Hei (Moana)
 * Heimlich (A Bug's Life)
 * Heinz Doofenshmirtz (Phineas and Ferb)
 * Hibari (Senran Kagura)
 * Hoagie Gilligan Jr. (Codename: Kids Next Door)
 * Homer Simpson (The Simpsons; Seasons 1-10, 13-15, 32-present)
 * Hooty (The Owl House)
 * Iago (Aladdin (1992))
 * Ibuki Mioda (Danganronpa 2: Goodbye Despair)
 * Izzy (Total Drama Island)
 * Jaq and Gus (Cinderella (1950))
 * Johnny Bravo (Johnny Bravo)
 * Joy (Inside Out)
 * Kaito Momota (Danganronpa V3: Killing Harmony)
 * Kamina (Tengan Toppa Gurren Lagann)
 * Katsuragi (Senran Kagura)
 * Kazuichi Souda (Danganronpa 2: Goodbye Despair)
 * Kiana Kaslana (Honkai Impact 3rd)
 * Kid Cosmic (Kid Cosmic)
 * K.O. (OK K.O.!: Let's Be Heroes)
 * Korg (Thor: Ragnarok)
 * Kou/KibaRanger (Gosei Sentai Dairanger)
 * Kronk (The Emperor's New Groove)
 * Louis (The Princess and the Frog)
 * Luan Loud (The Loud House)
 * Lucy's Psyduck (Pokémon Detective Pikachu)
 * Lucky (The Jungle Book 2)
 * Lumiere (Beauty and the Beast (1991))
 * Mabel (Gravity Falls)
 * Mario (SMG4 series; can occassionally be unfunny but is more often than not humorous)
 * Mark Surge (Hero Factory)
 * Marty (Madagascar)
 * Merry and Pippin (The Lord of the Rings)
 * Michelangelo (Teenage Mutant Ninja Turtles (2003))
 * Mike Wazowski (Monsters, Inc.)
 * Miko Kubota (Glitch Techs)
 * Milfeulle Sakuraba (Galaxy Angel)
 * Minions (Despicable Me films; excluding Minions)
 * Minori (Senran Kagura)
 * Misery (Ruby Gloom)
 * Mongo (Blazing Saddles)
 * Moose (Brother Bear)
 * Mr. Goodman (SuperMarioLogan, 2009-2016)
 * Mushu (Mulan (1998))
 * Natsu Dragneel (Fairy Tail)
 * Neptune (Hyperdimension Neptunia)
 * Nora Valkyrie (RWBY)
 * Olaf (Frozen)
 * Otoya Kurenai (Kamen Rider Kiva)
 * Otto (Airplane!)
 * Pain and Panic (Hercules)
 * Patrick Star (SpongeBob SquarePants (Seasons 1-5, 9-present))
 * Peashy/Yellow Heart (Hyperdimension Neptunia)
 * Peridot (Steven Universe)
 * Pig (Back at the Barnyard/Barnyard)
 * Pinkie Pie (My Little Pony: Friendship is Magic)
 * Pip (Enchanted)
 * Penny Polendina (RWBY)
 * Poof (The Fairly OddParents)
 * Ralphie Tennelli (The Magic School Bus)
 * Rallo Tubbs (The Cleveland Show)
 * Ram and Rom (Hyperdimension Neptunia)
 * Roger Smith (American Dad!)
 * Rex (Toy Story franchise)
 * Rex (Victorious)
 * Robbie Rotten (Lazytown)
 * Rocko (The Pebble and the Penguin (1995))
 * Roger Rabbit (Who Framed Roger Rabbit)
 * Ron Stoppable (Kim Possible (2002))
 * Saizou (NinjaBlue) (Ninja Sentai Kakuranger)
 * Satania (Gabriel Dropout)
 * Scooby-Doo (Scooby-Doo)
 * Sebastian (The Little Mermaid (1989))
 * Scrat (Ice Age)
 * Scuttle (The Little Mermaid (1989))
 * The Red Guy (Cow and Chicken)
 * The Seven Dwarves (Snow White and the Seven Dwarfs (1937))
 * Sheen Estevez (The Adventures of Jimmy Neutron, Boy Genius)
 * Sho (Ready Player One)
 * Shoji/TenmaRanger (Gosei Sentai Dairanger)
 * Sokka (Avatar: The Last Airbender)
 * Soos (Gravity Falls)
 * SpongeBob SquarePants (SpongeBob SquarePants (Seasons 1-5, 9-present))
 * Stimpy (The Ren & Stimpy Show)
 * Takamichi Crystalia/Kiramai Silver (Mashin Sentai Kiramager)
 * Timon and Pumbaa (The Lion King (1994))
 * Tom and Jerry (Tom and Jerry)
 * Tom Harper (Nicky, Ricky, Dicky & Dawn)
 * Tow Mater (Cars and Cars 3)
 * Uncle Johnathan (The House with a Clock in Its Walls)
 * Usagi Tsukino (Sailor Moon)
 * Vice President/President of the Senate (Mr. Smith Goes to Washington)
 * Wander (Wander Over Yonder)
 * Wilbur (The Rescuers Down Under)
 * Wile E. Coyote and the Road Runner (Looney Tunes)
 * Yao, Ling and Chien-Po (Mulan (1998))