* AdoredByTheNetwork: Creator/CartoonNetwork gave this a huge buildup: a "sneak peek" six days before the premiere (which also aired on Boomerang and streamed on the website), a countdown bug on-screen the day ''of'' the premiere, and at least one rerun a day for the entire week afterward.
** The Latin American version of Cartoon Network brings this trope UpToEleven. They went to such extent to dedicate a whole day to the show. They also use them to announce the new stuff of the month and air reruns '''three''' times a day, everyday, and they often air clips of this show during the commercial breaks for no reason at all.
** Cartoon Network also put a lot of faith into the show by renewing a second season a week before the premier, though this could have been done as the show spends a long time in production. Cartoon Network later renewed the show for a fourth and fifth season before the third season had even started airing.
* DawsonCasting: Aside from the Watterson children, kids in the show are played by adults.
* {{Defictionalization}}: [[Website/YouTube Elmore]] [[FictionalCounterpart Stream]] is now real... [[http://www.youtube.com/user/ElmoreStream sorta]].
* FakeAmerican: Most of the adult cast are Brits doing AmericanAccents. Technically averted with Sandra Dickson, who is an American based in the UK.
* FlashbackWithTheOtherDarrin: A flashback in "The Name" redubs a scene from the first season episode "The Curse" with Gumball's third season voice actor. The same goes for a flashback with Darwin in "The Extras" to the second season episode "The Sweaters". [[SeriesContinuityError This is even though]] "The Kids" established the different voice actor being from a voice change that hadn't happened before the third season.
* HeyItsThatVoice: Anais is [[WesternAnimation/AdventureTime Me-Mow]].
** In Japan, Gumball is reportedly Creator/JunkoTakeuchi, a.k.a. [[Manga/{{Naruto}} Naruto Uzumaki]].
** Granny [=JoJo=] is [[Series/TheHitchhikersGuideToTheGalaxy Trillian]]
** Creator/BrianBlessed is [[ChristmasEpisode Santa Claus]].
** In France, Richard (Papa) is [[WesternAnimation/RegularShow Benson, Muscle Man]], [[Manga/{{Naruto}} Gaara]], and [[WesternAnimation/TotalDrama Trent]].
** In Brazil and Poland, Nicole is [[WesternAnimation/JusticeLeague Wonder Woman]].
*** Interestingly, the Brazilian Nicole and Richard have mentored [[Series/{{Glee}} Rachel Berry]]; Richard used to be Rachel's high school teacher, whereas Nicole is her current dance instructor. [[note]]Nicole didn't date Finn Hudson.[[/note]]
** In Hungary and Italy, Gumball is [[WesternAnimation/ParaNorman Neil Downe]].
* TheOtherDarrin:
** Gumball was voiced by Nicky Jones (aka WesternAnimation/{{Chowder}}) in the pilot.
** In the first season Mr. Small, Tobias, Banana Joe, and Alan were all played by Rupert Degas and Ms. Simian was Sandra Searles Dickinson, while in the second season these roles were all taken over by Hugo Harold-Harrison. Tina also changed from Dan Russell to Stefan Ashton Frank, even though Russell continues to play all his other roles (including Richard).
** Both Gumball and Darwin were recast in season three due to their original voice actors hitting puberty.
** In season 1, Sussie was portrayed by the creator's girlfriend Aurelie Charbonnier but in season 2 she is replaced by British comedian Fergus Craig.
* PropRecycling: A lot of the characters are rejected advertising mascots Ben Bocquelet had in his portfolio.
* ShortRunInPeru: Several episodes have aired first in Brazil (Portuguese dub), France, Spain, Central and South America (still in English), and Australia.
* TalkingToHimself: Most of the dozen plus named students in Elmore Junior High are voiced by a few people, so this happens a lot. In particular, every non-adult female but Anais, Tina, and Sussie is voiced by either Teresa Gallagher or Jessica [=McDonald=].
* TheWikiRule: [[http://theamazingworldofgumball.wikia.com The Amazing World of Gumball Wiki]]
* WhatCouldHaveBeen:
** In [[http://issuu.com/worldscreen/docs/tv_kids_mipcom_2013 an interview (page 127)]], Ben Bocquelet revealed that the show was originally pitched to AdultSwim (yes, really) and about rejected cartoon characters in a remedial school. Cartoon Network found the idea to be too depressing and Bocquelet changed it to make it a more surreal, whimsical, and kid/family-friendly show.
** [[http://polyminthe.blogspot.com/2012/06/amazing-world-of-gumball-development.html At some point in development]] Richard was a skinny blue dog while Gumball was a black cat instead of a blue one.
** An "Early Reel" was made for the show as a pilot. The most noticeable differences are the fact Darwin was animated in CGI and Gumball had a square head, though other characters looked different too. Teri was also a boy, there.
** The people in "The Sweaters" from Richwood High [[http://theamazingworldofgumball.wikia.com/wiki/The_Sweaters/Gallery#Miscellaneous were originally going to be]] {{Funny Animal}}s like everyone else, rather than 70s/80s-cartoon-style humans.
** Sarah the Ice Cream's name was originally going to be [[http://theamazingworldofgumball.wikia.com/wiki/File:GB200_DOLLY_ORIGINAL_PUPPET.jpg Dolly]].
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