->'''Skeeter''': [[TheSmartGuy He's real brainy]].
->'''Scooter''': [[YouGoGirl She's athletic]].
->'''Skeeter''': We're so different...
->'''Scooter''': It's pathetic.
->She does stunts and
->I assist her.
->'''Skeeter''': He's my brother!
->'''Scooter''': And they tell me she's my sister!
-->~ ''MuppetBabies''

A SubTrope of the OddCouple wherein the odd couple are twins, usually identical brothers or sisters. A prominent exception is actually in the TropeNamer, ''ThePattyDukeShow''. It featured identical ''cousins'', who were described as "One pair of matching bookends, different as night and day" in the ExpositoryThemeTune.

Basically, [[SiblingYinYang Yin Yang Twins]] as the main characters, with this being part of the series premise.

Sometimes overlaps with CainAndAbel.

Extreme opposite is SingleMindedTwins.
----
!!Examples

[[foldercontrol]]

[[folder: Anime ]]

* The identical twin sisters Yubaba and Zeniba from ''SpiritedAway'': Yubaba is selfish and materialistic; Zeniba, while vengeful at first, turns out to be kindly and humble.
* Anna and Johan Liebert from ''{{Monster}}''. Anna's a nice, sweet girl who practices aikido and delivers pizza as a part-time job. Johan is [[ExactlyWhatItSaysOnTheTin the title character]].
* Kagami and Tsukasa from ''LuckyStar''. The former is a somber {{tsundere}} while the other is a [[TheDitz ditzy]] CloudCuckoolander. When asked about this by Konata, they point out that they are non-identical twins.
** [[{{Clannad}} Kyou and Ryou]]. Long-haired {{tsundere}} and short-haired easily-embarrassed. Sound similar?
* Mion and Shion Sonozaki from ''HigurashiNoNakuKoroNi''.
** It's even more odd, when you realize that [[spoiler:they're acting like each other, since they are each other.]]
* Rua and Ruka (Luka and Luna, respectively, in the dub) from ''[[YuGiOh Yu-Gi-Oh!]] 5Ds''. Rua is a rowdy, cocky duelist who overestimates himself. Ruka is quiet, introverted and is usually the one to notify Rua when he goes too far.
** The original series' Yugi and Yami Yugi can be counted as this if you consider them twins (of the split perosnality/alternate guy living in your head kind), with a dash of SiblingYinYang.
* Shiki and SHIKI from ''KaraNoKyoukai''. One is somber and speaks in {{Keigo}}, the other is somewhat carefree and [[JapanesePronouns speaks like a guy]].
** Though not in the same way, Shiki Tohno and Shiki Nanaya from ''{{Tsukihime}}''.
* The sweet YamatoNadeshiko Yuzu and the rough {{Bokukko}} Karin from ''{{Bleach}}''.
* Kouji and Koichi in ''DigimonFrontier''. Kouji is a pretentious snob who is an asshole that works by himself at first. His digimon is remniscent of a light wolf. Meanwhile his twin is similar in appearance but far more caring and willing to be in the group than his twin. And, his digimon forms are darkness oriented and are remniscent of a lion.
* The Kongo twins Unsui and Agon from ''{{Eyeshield 21}}''. Unsui has a shaved head like a monk (it's sort of a theme at their school) is intensely hard working, diligent, cautious, a very good athlete and basically a decent guy. But Agon (with a distinctive dreadlock hairstyle) is the series' JerkAss, a JerkJock to the extreme (including the womanizing, which apparently started in middle school) who gets away with being a sociopathic thug, slacker and general all-around asshole because he is [[TheGift a talent seen only once in a hundred years.]]
* Riku and Risa from ''DNAngel''. They even come out and say that their personalities are completely different. Risa is very girly and rather shallow, while Riku is tomboy-ish and more down to earth.
* Towards the end of the ''RanmaOneHalf'' manga, there is Pink and Link, identical twin girls from a village of herbalists that neighbours Shampoo's village of "Chinese Amazons" and who practice different branches of an unnamed [[MartialArtsAndCrafts "Martial Arts Herbalism"]], a fighting style that revolves around plants and herbalistic concoctions. Pink, who is usually smiling, is a wicked and vicious girl who loves to poison people. Link, who is usually frowning, is a kind and gentle girl who considers it her duty to heal those her sister hurts. Despite these opposite natures, they care for each other deeply and are capable of uniting with singular purpose when given motive... which means that, in their actual appearance in Nerima, they function more like SingleMindedTwins.
* ''GlassFleet'''s NonIdenticalTwins [[spoiler: Vetti and Cleo]] exemplify this trope. Though, their personalities are passed off as them having been raised separately, with the younger one subjected to [[spoiler: mental and sexual abuse]], giving him his screwed up personality.
*Hisui and Kohaku from ''{{Tsukihime}}''
** Also odd, when you consider that [[spoiler:they switched places from when they were children. Hisui was originally carefree and cheerful, while Kohaku was shy and untalkative. Then they got older and Hisui buried her emotions while Kohaku hid her true self behind a facade of happiness.]]

[[/folder]]

[[folder: Comic Books ]]

* Caring geek Wiccan and hyperactive badboy Speed from the ''YoungAvengers''.
* In ''ElfQuest'', this trope applies to the Wolfriders and Sun Folk elf tribes; the former are fair skinned warrior hunters who prefer the night while the latter are a dark skinned peaceful agricultural community who prefer the daytime. However, after a bad first impression, both communities find that they complement each other splendidly and gradually merge in smooth fashion.
*[[AttentionDeficitOohShiny Hyparactive]], FunPersonified speedster Bart Allen (aka [[{{Flash}} Impulse]]) and his collected, scheming, evil clone Thaddeus Thawne (Inertia). Bart even mentions ''The Patty Duke Show'' the first time they meet, suggesting they [[TwinSwitch switch places to befuddle their friends]]. Thad responds by [[KickTheDog punching Bart in the nose]].

[[/folder]]

[[folder: Film ]]

* ''[[{{Hellboy}} Hellboy II: The Golden Army]]'' has Prince Nuada and Prince Nuala; while they are HalfIdenticalTwins in appearance, WordOfGod says they were intended to be as different as night and day in all other respects.
* In the 1998 remake of ''TheParentTrap'', the twin girls, Annie James and Hallie Parker, are completely different. Annie is calm, reserved, and rather uptight while Hallie is relaxed, loud, outgoing, and a BigEater.
* In ''Eurotrip'' the twins Jenny and Jamie are pretty different. In the movie they even say they're the worst twins ever.
* In ''StarWars'', Luke is blonde, blue-eyed, calm, mild-mannered and naive; and is a mystical, religious Jedi Knight. Leia is brunette, brown-eyed, quick-tempered, sharp-tongued and worldly-wise; and is a shrewd, practical politician.

[[/folder]]

[[folder: Literature ]]

* Jacob and Esau from TheBible. In fact my book of children's Bible stories even had the chapter title "Twins Who Were Different."
* Dawn and Eve of PiersAnthony's {{Xanth}} are literally as different as day and night, from the fact that Dawn is red haired and green eyed, and is like the morning, while Eve is black haired and eyed and is like the night.
* Amoret and Belphoebe in ''TheFaerieQueene'': The former was adopted by Venus, the Goddess of Love and Beauty, and became a YamatoNadeshiko. The latter was adopted by Diana, the Goddess of Maidenhood and the Hunt, and became an ActionGirl.
* Occurs in GordonRDickson's ''Childe Cycle'' series of novels and short stories, in the characters of Ian and Kensie Graeme. Both are Dorsai ({{Proud Warrior Race Guy}}s). Ian is the epitome of the Warrior - seemingly aloof and intimidating by his sheer presence. Kensie is his polar opposite - warm, caring, social - everything that Ian is not. In the stories it's implied that together the two make up one individual.
** Ironically, it's Ian who's irresistible to women - ''[[ChickMagnet without realizing it]]''.
*** Which is a tribute to Dickson's understanding of Female Psychology. Of *course* we women would be drawn to a dark, broody type over a sunny open one!
* Both the books and TV version of ''SweetValleyHigh'', with the Wakefield twins Jessica and Elizabeth.
* The Eiran twins Eamonn and Grainne from ''[[KushielsAvatar Kushiel's Dart]]'' by Jacqueline Carey.
* Robert L. Stevenson's ''TheStrangeCaseOfDrJekyllAndMrHyde'': Dr. Jekyll and Mr. Hyde may be considered a variation of this trope.
* Shaun and Shem from ''Finnegan's Wake'' probably count, but it's hard to figure out which is which, due to the book changing their names constantly. All you need to know is one is boring and dull, and the other is really creative and artistic.
* In the original Story ''Lottie and Luise'' by Erich Kastner (aka "double Lottchen"), the titular twins had extremely different personalities, which made their [[spoiler: place change]] all the more hilarious. Most film versions omit this, though.
*The Brothers Majere; easy going, heroic BoisterousBruiser Caramon and intense, morally ambiguous SquishyWizard Raistlin in ''{{Dragonlance}}''.

[[/folder]]

[[folder: Live Action TV ]]

* Madison and Vida Rocca from ''PowerRangersMysticForce''. Madison is calm and thoughtful, V is on a permanent sugar high and goes rushing into things with a mad grin.
* ''SisterSister'', with Tia and Tamera Mowry.
* ''{{Two of a Kind}}'' and ''SoLittleTime'', both with Mary-Kate and Ashley Olsen.
* ''TheSuiteLifeOfZackAndCody'', with Dylan and Cole Sprouse.
* Russ on ''{{Friends}}'' is exactly like Ross (well, this troper would say he's Ross Only More So). Monica says "See? They're as different as night and...later that night."
*The '80s sitcom ''DoubleTrouble''. Identical twins Jean and Liz Sagal (younger sisters of Katey Sagal of ''MarriedWithChildren'') play identical twins Kate and Allison. Allison is serious and bookish; Kate is happy-go-lucky.

[[/folder]]

[[folder: Newspaper Comics ]]

* In the {{Scamp}} ([[SpinOffspring Son of]] LadyAndTheTramp) comics (Specifically the newspaper continuity), Scamp and his siblings are two sets of these. Twin Sisters Fluffy and Ruffy are dignified and tomboyish, respectively, while non-identical brothers Scamp and Scooter are adventurous and timid, respectively
[[/folder]]

[[folder: Mythology ]]

* Nisien and Efnisien from the Mabinogion (making this OlderThanDirt).

[[/folder]]

[[folder: Video Games ]]

* The Voerman sisters, stoic businesswoman Therese and emotional party-girl Jeanette, from ''VampireTheMasqueradeBloodlines''. You eventually discover [[spoiler: Therese is a Malkavian, a member of a clan of vampires known for insanity, and her "sister" Jeanette is actually her SplitPersonality. With [[TalkingTheMonsterToDeath high enough Persuasion skill]], you can convince the "sisters" to cooperate instead of one "killing" the other.]]
* [[RedOniBlueOni Hothead Dante and calculating Vergil]] from the ''DevilMayCry'' series.
* Hyperactive Yun and brooding Yang of the Lee Brothers from ''StreetFighter''.
* The Mikado twins from the {{GetBackers}} game ''Jagan Fuuin'': Daisuke is very compassionate and sweet and easily befriends the main cast, whereas his identical twin Kyosuke is cold, emotionless, rarely speaks, and seems robotic. It's eventually revealed [[spoiler:that the twins are the same person, namely Kyosuke, who, due to fear of their immense spiritual power, were split into two entities, the "body" and "soul". Daisuke was the soul, and once they were merged back into Kyosuke, he acted much like his "brother" did]].
* Dahlia and Iris Hawthorne from the third ''AceAttorney'' game. Dahlia is [[spoiler:a ruthless sociopath who has been using her cute and innocent image to get away with murder, literally, for years]] and Iris is [[spoiler:sweet, gentle, and compassionate, and honestly fell for the lead character while posing as her sister because she needed him for a master plan but didn't want to be bothered with actually seducing him]].
* The twins Palom and Porom from FinalFantasyIV. Palom is the mischievous user of black magic, and Porom is the mild-mannered user of white magic.
* Malfurion and Illidan Stormrage, the night elf twin brothers from the WarCraft universe.

[[/folder]]

[[folder: Web Animation ]]

* "Your" and "You're" are described as this in [[HomestarRunner Strong Bad's]] Rhythm'n'Grammar instructional cassette tapes.
->'''Strong Bad:''' Y-O-U-R
->Y-O-U-apostrophe-R-E
->They're as different as night and day
->Don't you think that night and day are different?
->What's wrong with you?

[[/folder]]

[[folder: Webcomics ]]

* Fraternal twins Beef and Walky in ItsWalky, justified as Beef was actually switched at birth with Walky's real twin Sal as part of Mrs. Walkerton's ''SeparatedAtBirth'' gambit, Sal and Walky later, after the truth was uncovered, and used to set up some NotSoDifferent moments between the two of them.

[[/folder]]

[[folder: Western Animation ]]

* Scooter and Skeeter in ''MuppetBabies''. They sang a song dedicated to this in the episode about opera.
* Suntop and Ember from ''ElfQuest'' actually brought the MediaWatchdogs down on them when their creators tried to get an AnimatedAdaptation going. Turns out Saturday Morning Cartoons is not the time to reverse genders roles and have a spunky little girl and a mild, intuitive little boy.
** Or, for that matter, twins with different skin colors.
** [[CanonDisContinuity What are you talking about?]]
* Dagget and Norbert, twin beavers from ''AngryBeavers''.
* The entire premise of the ''CrampTwins''.
* Zak and Wheezie from ''DragonTales'', who are even very different colors!
* Oracle twins Kara and Sara from ''AmericanDragonJakeLong''. It's played around a bit as it is gothic Kara who foresees good events in the future while blonde and preppy Sara forsees the bad events.

[[/folder]]

[[folder: Real Life ]]

* Real life example (kinda): Amanda and Michelle Babin, who were contestants on ''AmericasNextTopModel,'' Cycle 7. Michelle is tomboyish and more outgoing, whereas Amanda is more feminine and introverted. Michelle also came out of the closet during the course of the show, just to add another night and day difference to the mix.
* [[ThisTroper This twin]] is left-handed, brown-eyed, with straight brown hair, bookish, and female. The other twin is right-handed, blue-eyed, with curly red hair, athletic, and male. They also have different blood types, skin tones, and food preferences.

----
<<|CharacterizationTropes|>>
<<|IndexOverdosed|>>
<<|OlderThanDirt|>>
<<|TwinTropes|>>
<<|{{Foil}}|>>