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

 * Bob Bobowski (SMG4 2018 only)
 * Bog King's Minions (Strange Magic)
 * Burt Burtonburger (Kid vs. Kat)
 * Chad Amani (Chad)
 * Charlie (Thomas & Friends)
 * Cisco Ramon (The Flash)
 * Cosmo (The Fairly OddParents; Seasons 9 - 10)
 * Denzel Crocker (The Fairly OddParents (Seasons 9-10))
 * Devon and Cronwall (Quest for Camelot)
 * Fanboy and Chum Chum (Fanboy and Chum Chum)
 * Francis (Super Paper Mario)
 * Gamzee Makara (Homestuck)
 * Grubber (My Little Pony: The Movie)
 * Gus Turner (RobotBoy)
 * Hi-5 (The Emoji Movie)
 * Hifumi Yamada (Danganronpa: Trigger Happy Havoc)
 * Homer Simpson (The Simpsons; Seasons 11-12, 16-31)
 * Hudson Gimble (Game Shakers)
 * Jacquimo (Thumbelina (1994))
 * 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))
 * Lee Dongho (The Devil's Boy)
 * 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. 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)
 * Terk (Tarzan (1999))
 * The Brain (Igor)
 * The Lemmings (Norm of the North)
 * The Logging Locos (Thomas & Friends)
 * Uncle Grandpa (Uncle Grandpa)
 * Victor, Hugo, and Laverne (The Hunchback of Notre Dame (1996))
 * Weasel (Deadpool)
 * 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)
 * Aoi Asahina (Danganronpa: Trigger Happy Havoc)
 * 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)
 * Chicken Joe (Surf's Up)
 * Cogsworth (Beauty and the Beast (1991))
 * Cosmo and Wanda (The Fairly OddParents Seasons 1-8)
 * Craig the Devil (SuperMarioLogan)
 * Donald Duck (Mickey Mouse)
 * Donkey (Shrek)
 * Dory (Finding Nemo/Finding Dory)
 * Dr. Drakken (Kim Possible)
 * Ducky and Bunny (Toy Story 4)
 * Emile (Ratatouille)
 * Featherstone (Gnomeo and Juliet)
 * Flora, Fauna, and Merryweather (Sleeping Beauty)
 * Gandhi (Clone High)
 * Genie (Aladdin (1992))
 * Geoffrey the Butler (The Fresh Prince of Bel-Air)
 * Gobber (How to Train Your Dragon)
 * Goofy (Mickey Mouse/Goof Troop)
 * Hei Hei (Moana)
 * Homer Simpson (The Simpsons; Seasons 1-10, 13-15, 32-present)
 * Iago (Aladdin (1992))
 * Ibuki Mioda (Danganronpa 2: Goodbye Despair)
 * Jaq and Gus (Cinderella (1950))
 * Kaito Momota (Danganronpa V3: Killing Harmony)
 * Kazuichi Souda (Danganronpa 2: Goodbye Despair)
 * Kid Cosmic (Kid Cosmic)
 * K.O. (OK K.O.!: Let's Be Heroes)
 * Korg (Thor: Ragnarok)
 * Kronk (The Emperor's New Groove)
 * Louis (The Princess and the Frog)
 * Lucy's Psyduck (Pokémon Detective Pikachu)
 * Lumiere (Beauty and the Beast (1991))
 * Mabel (Gravity Falls)
 * Mario (SMG4 series; can occassionally be unfunny but is more often than not humorous)
 * Merry and Pippin (The Lord of the Rings)
 * Michelangelo (Teenage Mutant Ninja Turtles (2003))
 * Minions (Despicable Me films; excluding Minions)
 * Mongo (Blazing Saddles)
 * Moose (Brother Bear)
 * Mr. Goodman (SuperMarioLogan, 2009-2016)
 * Mushu (Mulan (1998))
 * Nora Valkyrie (RWBY)
 * Olaf (Frozen)
 * Otto (Airplane!)
 * Pain and Panic (Hercules)
 * Patrick Star (SpongeBob SquarePants (Seasons 1-5, 9-present))
 * Pig (Back at the Barnyard/Barnyard)
 * Pinkie Pie (My Little Pony: Friendship is Magic)
 * Pip (Enchanted)
 * Rallo Tubbs (The Cleveland Show)
 * Roger Smith (American Dad!)
 * Rex (Toy Story franchise)
 * Ron Stoppable (Kim Possible (2002))
 * Scooby-Doo (Scooby-Doo)
 * Sebastian (The Little Mermaid (1989))
 * Scrat (Ice Age)
 * Scuttle (The Little Mermaid (1989))
 * Sheen Estevez (The Adventures of Jimmy Neutron, Boy Genius)
 * Sho (Ready Player One)
 * Sokka (Avatar: The Last Airbender)
 * Soos (Gravity Falls)
 * SpongeBob SquarePants (SpongeBob SquarePants (Seasons 1-5, 9-present))
 * The Seven Dwarves (Snow White and the Seven Dwarfs (1937))
 * Timon and Pumbaa (The Lion King (1994))
 * Tow Mater (Cars and Cars 3)
 * Uncle Johnathan (The House with a Clock in Its Walls)
 * Vice President/President of the Senate (Mr. Smith Goes to Washington)
 * Wander (Wander Over Yonder)
 * Wilbur (The Rescuers Down Under)
 * Yao, Ling and Chien-Po (Mulan (1998))