A common Fairy Tale situation. Whenever multiple siblings are portrayed, the youngest is the hero; the older ones are either evil or just boring.
In a standard story template that often goes along with this, each child in turn receives instructions from a (usually magical) source on how to make their fortune; the older two ignore the advice and suffer the consequences, while the youngest one follows it and gets a happy ending. Usually, this child is ostensibly somehow worse than his siblings — either more foolish (and thus more honest) or smaller and weaker (but cleverer). Even if he isn't, the older children are prone to believe that he is.
The youngest daughter is often the most beautiful or otherwise most desirable. In cultures where the daughters must be married off in order of age, this can really complicate life.
However, if the older children are stepchildren or half-siblings, that usually trumps this trope; the younger children usually succeed only if they are not hostile to their half siblings. (When the children are stepsiblings, the hero is usually both the youngest and the child of the first wife... confusingly. Though easily accounted for if the stepchildren were older than the hero when the hero's parent married the stepparent.)
Also, this trope usually applies to a set of all sisters or all brothers. "Hansel and Gretel" is perhaps the best known of the many tales where children of mixed-sex work well together. If there are several girls and one boy, he is the hero; if there are several boys and one girl, she is the hero.
Indeed, in some tales, the older children do not feature as characters; their only purpose is to make the hero a youngest child.
Usually when this occurs the number of children is numerologically significant: three, seven, or occasionally twelve.
Often this carries undertones of underdog vindication, as in any setting in which inheritance occurs by primogeniture the youngest will naturally get the short end of the stick.
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This trope is rife in adverts for family games, such as board games and multiplayer platforms. The advert will typically display a family of four in which the youngest child (typically a girl, though not always) will win. On the boxes for older board games, the young child will be grinning with clenched fists whilst the father will have head in hands.
Anime and Manga
Misty from Pokémon doesn't have the model-esque beauty of her older sisters, but she did get all the talent as a trainer. The other three are just content to give badges away.
Inverted by Triangle Heart 3: Sweet Songs Forever, in which Kyouya is The Protagonist. He has more training and fewer reservations about fighting than Miyuki (who only started training after her father's death, and mostly to protect Fiasse) does, and Nanoha is useless in combat, her role here as a cute Token Mini-Moe to cart around in the civilian scenes. When she does get her "mad magic skillz", she's nowhere near as impressive as her Alternate UniverseSpin-Off self. That said, it's not necessarily like her older siblings don't have the skills they have in TH3. It's just that it's not their story.
There are three Tendo sisters in Ranma ½. Guess which one gets to be the main character love interest of Ranma? In the sense that the older two foisted the Arranged Marriage onto the youngest in milliseconds, at least...
Also note despite all three of them growing up in a dojo, Akane seems to be the only one who knows martial arts...
Kenshiro, the youngest of the four Hokuto brothers, ultimately becomes the official successor of the deadly 2000-year old martial art Hokuto Shinken.
Kaioh, Raoh and Toki are siblings (in that order) and Toki is the most talented among them.
Roah is the most powerful, Toki the most skilled, Kenshiro the most suitable to be successor since Toki's ill body would not be able to carry on the school.
While Jagi, the shame, gets nothing but a humiliating death.
Otori Kyouya from Ouran High School Host Club is the youngest of his brothers (with a sister thrown in the middle somewhere), but his father fully expects him to take over the company over his two brothers after pulling a major Big Damn Heroes moment on the old man.
Myrrha/Husky from +Anima has lots of older step brothers who hate him and make fun of his girly looks and 'husky' voice. Oh wait, wasn't Husky the one who was named the Crown Prince by the father all of them share?
In the series finale of Code Geassthe Britannian throne is inherited by Nunnally, the youngest of Charles' named children. Technically, Carline is the same age, but she was ahead of Nunnally in line to the throne while Charles was alive.
Carline (along with Odysseus and Guinevere) most likely died when the not evacuated city of Pendragon was destroyed by a F.L.E.I.J.A nuke. She, Guinevere and the rest of the royals were explicitly last shown cleaning the palace there as servants. So Nunnally likely was the youngest left of Charles' named children.
Deconstructed with the Kongo Brothers of Eyeshield 21. Although they're twins, the elder brother is completely overshadowed by his younger brother's incredible talent. As a result, the younger twin is very arrogant and treats his elder brother (and everyone else) coldly, while the elder twin's self esteem is completely crushed and feels his only purpose is to help his younger brother.
Every season of Digimon follows this trope. Everyone who has a digimon partner is either the youngest child in their family or has a younger sibling who also has (or will have) a digimon partner. The only exceptions to this rule is Juri's younger brother and Thomas' younger sister. Both of them are only half-siblings, though, so they may not count.
Takuya is an unquestionable aversion as he has a younger brother back in the real world who never has anything to do with the Digital World.
In Naruto, the Sage of Six Paths had two sons. The elder would become the ancestor of the Uchiha, the younger would become the ancestor of the Senju and possibly the Uzumaki. The Sage decided that the younger would be the one "to inherit his dream of peace." As to what this means, or why the older one got mad, no one has any idea.
However, this was more due to clashing philosophies. The Sage asked them what was the path to peace. The elder brother, who gained his father's 'eyes' declared power was the key. The younger brother, who gained the 'body', said love was the key. The Sage chose the younger brother as his successor for the world.
In the Pretty Cure franchise, the only Cures who are the youngest children in their families are Mai, Komachi, Erika, Itsuki and Reika. Considering that only females can be Pretty Cures, Komachi and Erika are the real winners.
In Bleach, Szayelaporro Granz is the Octava Espada while his older brother Yylfordt is just one of (Sexta Espada) Grimmjow Jaegerjaquez's Fracción.
Well, the fact that both Granz brothers are brothers is a plot hole. Hollows are Pluses who became soul-eating evil monsters. After some of them start to eat Hollows as well, a group of Hollows who fight against each to "eaten or being eaten" fuse into Gillians, the lowest class of Menos Grande Hollows. Both Granz brothers were Menos Grande before they became Arrancars. It's impossible that they are biological brothers, so they must be another kind of brothers. Unless the Hollows that ultimately dominated the Menos were in fact brothers in life.
In Million Dollar Kid, a tycoon gives one hundred million yen to each of his three sons and tells them the one who best uses the money will be his successor. What he doesn't tell is that he intends to use the test as an excuse to cast the youngest son away from the family. His disapproval of the youngest son is based on the boy's gambling addiction. The series is focused on the youngest, whose luck smiles to him whenever he risks it all.
The song "The Bonny Swans" by Loreena McKennit, which combines this trope with a standard English Murder Ballad template. This is a version of a specific ballad called "The Twa Sisters" (Child #10) which is sometimes also known under other titles such as "The Cruel Sister". Other forms can be found elsewhere in the Child Ballads.
The eldest was baith tall and fair, But the youngest was beyond compare. The midmost had a graceful mien, But the youngest lookd like beautie's queen. The knight bowd low to a' the three, But to the youngest he bent his knee.
"Cinderella" is a classic example (though her older sisters are stepsisters rather than blood relatives).
The earliest known version of the story, Yeh-Shen, actually inverted this trope, with Yeh-Shen being the elder daughter and her stepmother's daughter (her wicked half-sister) being the younger one. Many Asian variants of the story follow suit.
The Grimm tale, "One-Eye, Two-Eyes, Three-Eyes," is a rare Cinderella variant where the middle-child is the heroine. A witch has three daughters, the eldest is a cyclops and the youngest has three eyes. The middle-daughter not only has two eyes like any other mortal, but is very beautiful, and is abused by her cruel mother and sisters until she is rescued by a prince.
In most versions of "Beauty and the Beast", Beauty is the youngest of three sisters, the other two of whom are generally portrayed as at least somewhat materialistic, sometimes worse.
"The Twelve Dancing Princesses" contains a inversion. The hero, a soldier, follows the eponymous princesses through a magical landscape while wearing an invisibility cloak. Only the youngest senses that something's amiss, while the eldest keeps telling her to shut up and stop complaining. Her concerns are portrayed as rather whiny and feeble, and at the end, when offered a princess to marry, the soldier announces, "I'm not as young as I used to be, so I'll take the eldest."
In some variants, the hero is young and again takes the youngest, probably because the power of the original trope is so strong that retellers of the tale felt the need to "correct" it.
In others, the hero basically says "All your daughters have proven themselves not to be trusted. I'm not going to take any one of them!"
In "Puss in Boots", the main human character is the youngest son of a miller; when the miller dies, his older brothers get any property and wealth left behind, and all he's left with is the title cat... who manages to get him elevated to nobility, inheriting the castle and riches of an ogre, and married to a princess.
In "Lord Kotura of the Winds", an Arctic village is being threatened by harsh winds, and a father with three daughters surmises that Lord Kotura of the Winds is angered and can only be appeased with a wife. He sends his eldest daughter to Lord Kotura's dwelling with very specific instructions. She ignores every single one, and then when she finally gets to Lord Kotura's dwelling, she also ignores his instructions; and in the end Lord Kotura angrily casts her out of his home to freeze to death in the snow. The winds grow stronger, and the father sends out his second daughter. Pretty much the exact same thing happens, and when the winds grow harsher once again, the father sends out his youngest daughter, who follows his and Lord Kotura's instructions to a T. Greatly pleased, Lord Kotura makes her his wife, the winds die down, and the village is saved.
"Hop-o'-My-Thumb" is the youngest child in the family and manages to outwit a giant and rescue his siblings.
In the "The Master Thief", the hero has two older brothers who do not feature in the tale; their only purpose is to make him the youngest.
In "The White Dove", a Wicked Witch gets two brothers to promise her their younger brother for their safety; then she kidnaps the younger brother and tries to destroy him with impossible tasks. When he survives and returns, the older brother confess and insist that he be their father's heir.
In "The Bird Grip" and "The Golden Bird", despite warnings, the older princes go to the merry inn, where they forget their father, and their quest. The youngest goes to the dark inn and travels on to complete the quest.
In "The Seven Foals", an old woman tries to lure aside the men set to watch the king's foals all day. She succeeds with the older two of three brothers, but the youngest runs by her.
Never shall the younger be wed before the older ones!
Utterly inverted by the "Three Billy Goats Gruff". The troll ignores the younger brothers after being told that the next eldest is larger and more filling, and the eldest is the one who's strong enough to defeat him.
"The Honey Princess" does this twice. The sons of a king travel to a cursed castle, where the dwarf running the place gives them three tasks to complete. If they fail, they are turned to marble. Natch, the eldest sons are quickly turned to statues while attempting the first task. The youngest son not only completes all three tasks, but has to figure out which frozen princess ate a spoonful of honey before turning to marble. The youngest princess did.
The tale of "Three Mayflies", who learn that they only have one day to live. The first one decided to fly really fast, so that Death would never catch up. He got tired, stopped for a rest, and Death took him there after just 20 hours. The second one figured that if he flew backwards, he'd never age. It worked, but he was so tired that he couldn't live through the second day, and Death took him with ease. The third mayfly decided to make the most of the time he had, living 25 hours and dying with no regrets.
An example of an older stepchild trumping this trope appears in "Alphege, or the Green Monkey". Alphege, the son of the king's first wife, is the protagonist. When Alphege disappears, his stepmother sets up her son as the king. Subverted, though, that the younger brother is not evil and willingly gives up his throne when Alphege returns.
All the Scandinavian Askeladd stories, in which the eponymous Askeladd is inevitably the youngest of three brothers and inevitably succeeds where the other two fail (or, occasionally, even try when the other two don't bother).
About two thirds of the stories collected in Italo Calvino's Italian Folktales start off like this. "There was a poor man/king/poor woman who has thee sons/three daughters. The youngest was the most beautiful/kindest/most intelligent..." Sometimes there are 12 children, but it's nearly always the youngest who has the cool adventure. In "The Dragon With Seven Heads", it's the oldest, and the other two brothers follow him after he comes to harm, but they're triplets.
In "How the Dragon was Tricked" features two brothers. The younger brother is the protagonists and wins over the king's daughter, while the older brother gets nothing.
In "Tritill, Litill, and the Birds", the youngest brother succeeds in saving the princess from an ogress while the two older brothers are killed by an ogress.
"The Princess on the Glass Hill" has a family whose hay is eaten every year by a mysterious spirit. His two older brothers are scared by the spirit (who brings earthquakes), but Boots not only stays calm three years in a row and keeps the hay safe, but also gets three suits of armor and three horses and is able to ride to the princess with them.
In the lesser-known story "Le Chevalier de Fortune" aka "The story of Belle-Belle," it is the old soldier's youngest daughter who successfully disguises her gender, becomes the king's favorite soldier, gains magical servants and riches and ultimately marries the king. Interestingly, though she's the youngest, she was also the tallest and physically the strongest, which is part of how she successfully hid her gender in the first place, unlike her daintier, older sisters.
In "Childe Rowland", the two older brothers fail in rescuing their sister from Elfland, and only Childe Rowland succeeds in rescuing his sister and his brothers.
Inverted in the French fairy tale "Aurore and Aimée", where the older sister Aurore is good and the younger sister Aimée is evil, though it is played straight with Fourbin (who marries Aimée) and Ingénu (who marries Aurore).
In "The Daughter of Buk Ettemsuch", a couple leaves their seven daughters with provisions for three years. The father tells the girls to never open the door. One day, the oldest daughter announces that she wants to go to the market. The youngest daughter warns her that this violates their parents' warning. The six older sisters attack the youngest daughter. Turns out the youngest daughter was right - a witch breaks into the girls' house after the sisters buy vegetables from the market. The witch eats the six older sisters - only the youngest one escapes.
Frozen: Averted. Hans is the youngest of thirteen brothers, yet he ends up being the villain. The other brothers play no role except to explain why Hans wants the throne.
Film — Live Action
In It's a Wonderful Life, it appears to be in full force; while George is kept out of the army by the fact that he's deaf in one ear, his younger brother Harry goes to war and saves an entire ship of sailors, becoming acclaimed for his heroism. But the Wonderful Life reveal is that without George's having saved Harry's life when they were young, all those sailors would have drowned when the ship was sunk; and Harry, on hearing that George is in trouble, drops everything - including a meeting with President Harry Truman to congratulate him on his heroism - to run to his aid.
Parodied with the two Lindberg brothers in The Apple War. They were originally three, and the older brothers would fail at everything they did, while the youngest would always succeed. After their life project went wrong they decided to commit suicide... and the two older brothers failed.
In Ran, Saburo, the youngest of Lord Hidetora's three sons, is more honorable than his two conniving brothers, Taro and Jiro. Unfortunately, he doesn't 'win' anything for it. Then again, Ran is supposedly a Japanese adaptation of King Lear. (See below.)
In Repo! The Genetic Opera, the two elder Largos are fighting to inherit Gene Co. In the end, however, it is Amber - who initially showed no interest in the company - taking over.
Inverted in Robin Hood: Prince of Thieves when Robin's younger half-brother reveals his identity. Robin and his father had bad blood because after his mother died, his widowed father took up with a peasant woman for companionship. Robin never forgave his father (while he was alive), for this perceived betrayal of his mother's memory even after he left the peasant woman. Robin never even knew that he had a half-brother who got left in the lurch in the process.
David, the boy who is being protected by the main character in J M Coetzee's The Childhood of Jesus is obsessed about what he calls "Third Brother stories". To the point that he wants to have two older brothers somehow so that he can be the youngest of three.
Death, in the tale of the Three Brothers in The Tales of Beedle the Bard, pretends to congratulate the three brothers for cheating death, and rewards them, with full intention of being this. Only the youngest brother sees through the ruse and has his reward tailored specifically to prevent Death doing this to him. The other brothers are not so lucky.
Lampshaded and subverted in Diana Wynne Jones's Howl's Moving Castle, where Sophie, the heroine, is the eldest of three sisters and knows that it's her younger sister who is destined for greatness. The twist is that Sophie is actually the most magically powerful of them, and the youngest just wants to live a peaceful, happy, and mundane life.
In Motherland, there are references to the Biblical birth of Jacob, and the younger of the two protagonist brothers is considered to have gotten the better end of the stick as far as their inherited psychic powers go. His powers aren't better exactly, but they haven't driven him insane by the time of the story.
Played with twice by Isaac Asimov in two separate stories. In the earlier one, a queen has triplets, causing the king a bit of consternation as to which one will have the adventures. (Things take care of themselves, however, as the last one out has the most success.) In the later, the protagonist prince is an only child, and again the king cites this trope (whereupon his wife points out he's not the one that had to give birth).
Also toyed with, along with a great many other fairy tale tropes, in Mercedes Lackey's The Fairy Godmother. When the three sons of a king are sent out on a mission, the fairy godmother sets obstacles for them which only the youngest son, by virtue of his kindness and humility, passes, and so it's the youngest son who succeeds on his quest, as per the trope. However, the youngest son is only a minor character in the book, while the second son (despite being the biggest ass of the three... and punished accordingly) becomes one of the two main protagonists and ends up better off than he would have been if he'd succeeded on the original quest.
Joanne Harris' Blue Eyed Boy describes a family of three sons, who are forced to wear Black for the eldest, Brown for the middle, and Blue for the youngest. Guess who's mother's favourite... However the way Harris plays with our assumptions throughout the novel means this trope is actually subverted.
Third child Ender is described as "the metal in between" his compassionate sister and sociopathic brother, making him the perfect choice for a military commander. Though, considering the trauma he enduresas a result, this may not count as "winning."
Used in Cecilia Dart-Thornton's mythological fantasy The Crowthistle Chronicles.
In the Star WarsExpanded Universe, Anakin Solo is often portrayed as the brightest and most talented of the Solo children. It's subverted when, thanks to Executive Meddling, he dies in the New Jedi Order. The Legacy of the Force series makes it a Double Subversion: the elder brother turns evil, and the sister becomes a warrior and slays him. Anakin continues to be held up as the only good-n'-pure Solo sibling.
Deeply subverted in Andrew Lang's "Prince Prigio", where the title prince is the oldest, doesn't believe in Fairy Tales and argues that his younger brother should be sent off before him.
Also Thurber: The Fairy Tale spoof "The White Deer" features three brothers, of which the older two are brawny insensitive types, and the youngest a gentle romantic. The book surprisingly gives all three a fair amount of attention but still makes it clear the youngest is meant to be the most admirable.
In Dan Abnett's Warhammer 40,000Horus Heresy novel Legion, the Cabal declares they have foreseen that the Emperor's oldest and youngest sons were the most significant. They say this to the youngest sons, having deduced that Alpharius and Omegon are twins.
Done with a twist in the The Canterbury Tales: Three brothers find a treasure, and send the youngest off to get wine to celebrate. The older two plot to beat him to death when he returns, while he poisons their wine bottles. He comes back, they kill him, drink the wine and die themselves.
In The Silmarillion, Finwë has three sons: the two eldest die in battle, the youngest doesn't and presumably remains king of the Noldor in Valinor until the end of Arda. Then again...he's barely in the story at all, being much less Bad Ass than his brothers — and being sensible enough not to rebel against the Valar and exile himself from the safest, best place in Arda.
In both of Robin McKinley's retellings of "Beauty and the Beast", Beauty and Rose Daughter, Beauty is the youngest of three daughters. The trope is subverted in that in both versions, the main character's elder sisters are beautiful and kind-hearted, and love her dearly; while she is the one who has the adventures, the elder sisters also get their happy endings. It's further subverted in Beauty in that she's not technically the youngest child — just the youngest living child. The fourth sister, Mercy, died at birth.
In the Dragonriders of Pern books, Menolly is the youngest child of the Holder of Half-Circle Sea Hold, and The Unfavorite to boot. Despite parental abuse and general mistreatment, she escapes from her unpleasant surroundings and goes on to become the Master Composer of the planet. She even gets to keep in contact with the only one of her siblings who was ever kind to her, while managing to avoid everybody who wasn't.
Both played straight and subverted in The Tales of Alvin Maker series, Alvin is the seventh and youngest son. Then, Calvin gets born and is destined to be Alvin's greatest enemy, being the one to kill him. So technically, youngest child still wins.
Completely averted in the GONE series. Twins Sam Temple (older) and Caine Soren (younger) have been at odds since book 1. Guess who wins nearly every fight? And in the last book of the series, we have Caine dying via Heroic Sacrifice while Sam survives, having a fairly happy ending with his girlfriend Astrid.
Both averted and played straight in the Mortd'Arthur cycle. Arthur seems to be this kind of younger sibling... only it turns out that his father Ector never told him he was adopted, and from then on he never strictly regards Kay as his brother. Of Morgawse's children, the youngest legitimate son, Gareth, is the most good-natured and charming (not that it does him much good in the end), but her youngest actual child is the archetypal Bastard Bastard, Mordred.
Stefan Salvatore in The Vampire Diaries. Unlike Damon, who was The Unfavorite since childhood, Stefan, who is the youngest child of the Salvatore family, was the favoured child by not only his father, but by EVERYONE. Although Damon was supposed to be the heir to the Salvatore inheritance because he is the eldest child, Giuseppe planned on giving the inheritance to Stefan instead of Damon, showing the strong favouritism that he had for his youngest son over his eldest son.
In Andre Norton's Ice Crown, Clio's practice is ultimogeniture, because the older sons would have made their own way by the time the father dies.
In Hans Christian Anderson's "The Wild Swans," the youngest child (and only daughter) of twelve is the heroine. Eliza's brothers have been transformed into swans by their Wicked Stepmother so she is the one that must save them. Also notable is that the youngest brother keeps one swan's wing due to a mistake note Eliza had to make shirts out of nettles for each of them to turn them back. She didn't finish the eleventh shirt in time.
In the origin story of the Greek Gods, Zeus was the youngest child of Cronus and Rhea and the only one to not be eaten by Cronus (himself the youngest of Gaia and Ouranos' Titans.) He would eventually free his older siblings, overthrow Cronus, and take his place as the king of the Gods. This makes this trope Older Than Feudalism, though you can also think of this example as an inversion: when Zeus freed his siblings, they are considered to be "reborn" in the order they are released, making Zeus also the oldest, sort of. In any case, it's a Justified Trope, since the only reason Zeus didn't get swallowed like his siblings was because Rhea finally figured out how to keep that from happening.
Cronus was also the youngest of Gaia and Ouranos' children. First they had all the other male Titans, then all the Titanides, then Cronus.
Inverted with the three Gorgons. Medusa is the youngest and she's the only one who's not immortal. Or it could be Played Straight in a meta sense, considering she's also the most well-known.
In fact it goes all the way back to the story of Psyche and Eros, from Apuleius' The Golden Ass, in which Psyche's sisters are jealous both of her beauty and her creepy ability to be happy with a husband who won't let her see him in daylight. (Although, mind you, Psyche is not good at following basic instructions.)
In Philippine myth, three brothers are looking for the legendary Adarna bird. Halfway through the story, Prince Diego, the middle child, marries Princess Juana, leading more or less a normal life with her; Prince Pedro, the oldest child—who was pretty much a Manipulative Bastard towards his brothers—marries Princess Leonora and inherits his father's throne; Prince Juan, the youngest child, marries the most beautiful and enchanted of the princesses, Princess Maria, and inherits her father's kingdom.
Three times in a row with Isaac and Ishmael, Jacob and Esau, and Joseph and his brothers. Technically Joseph was the son of the beloved wife, and thus the favorite; true youngest Benjamin was kept at home to keep him away from danger and one of the older brothers had to basically call a curse on himself so the father would allow Benjamin to go to Egypt with him, and Joseph favors Benjamin there.
Arguably inverted with Joseph, who was Rachel's eldest son.
Joseph's own children also get blessed counter to the cultural expectation, though this is not too big of a surprise considering Jacob is a youngest. (Joseph thought Jacob was making a mistake, but Jacob knows what he's doing and even crosses his arms so that the Right Hand of Blessing goes to the younger son.)
Amram of the Levi tribe in Egypt had three children: daughter Miriam and two sons, Aaron and Moses, four and seven years younger than Miriam, respectively. Guess who is remembered as the most badass prophet of the Old Testament. Though to be fair, all three of them hold pretty important positions in the tradition.
King David is also an example; he was the youngest of eight brothers, yet God had Samuel pass over all seven of his older brothers before anointing him.
And he was succeeded by his youngest son Solomon.
In the parable of the Prodigal Son, the younger son callously asks for his share of the inheritance, runs away from home to seek adventure, and squanders it all on wasteful living, only to be welcomed back with open arms when he decides to slink home. The older son is not pleased about this, but the attempt to Calling the Old Man Out backfires: Dad points out that the older son has the lion's share of the estate, so can't he be happy that his little brother came back alive? (The point of the parable, of course, is that both sons were in need of serious attitude adjustment.)
Jesus called a couple of pairs of brothers to be His Apostles: Andrew & Peter and James & John. Peter and John were both the younger of the two, and they were, respectively, the first Pope and the only Apostle to die of natural causes, rather than martyrdom. Also noteworthy is the fact that John was the youngest of the Apostles and that Jesus entrusted to him the care of His mother.
Cordelia in King Lear is the youngest of three sisters and the only one to care about their father... but ultimately it's a subversion. She may be virtuous, but she doesn't win. Nobody does.
Richard III. He beats his two older brothers (by murdering them) but eventually loses to Henry Tudor.
The Taming of the Shrew by Willie "Bubba" Shakespeare. The youngest daughter of the family was the one who was beautiful, desired, and had beaus swarming like flies. But the other, bitchy one had to marry first. Also note that the younger daughter basically enslaved her husband, while the older one submitted to hers.
As a famous actress once observed, Bianca is the real shrew, or at least a manipulative bitch who's got her daddy and admirers twisted round her little finger and successfully gotten her older sister labelled 'the bad one'.
Deconstructed in Ace Attorney with Morgan and Misty Fey. In the Fey clan, the older sister typically has more spiritual power and inherits the title of Kurain Master, while the younger sister becomes a part of the branch family. However, Misty Fey becomes an example of this trope by inheriting the Master title and beating out her big sis Morgan in pretty much everything spiritual. Morgan doesn't exactly take this in stride; she becomes intensely resentful and concocts several twisted plans to kill Misty's daughter so Morgan's own young daughter can reclaim the title of Master.
In Fire Emblem: Genealogy of the Holy War, Prince Jamka is the youngest son of King Batou of Verdane (the first nation to attack the protagonists) and joins Sigurd's army after his two brothers and his father fell under the machinations of the Lopto cult. In the manga, he becomes the king of Verdane after his father's death.
In Fire Emblem Tellius, Kurthnaga was the only one left to inherent the throne of Goldoa after his oldest sibling, the heir-presumptive, was killed and the middle sibling lost her powers.
The DS remake of Dragon Quest V gives Nera an older sister, Debora, whose very existence highlights what a wonderful young woman her younger sibling is. Everyone heaps praise on Nera, while Debora is acknowledged as beautiful, but a total pain. Notably, their father has completely given up on marrying Debora off, and his Engagement Challenge draws Nera's admirers from all over.
Dragon Age: Origins has a potential Subversion of this with Prince Bhelen. He coordinates the death of his oldest sibling and causes his other Brother/Sister to get exiled for it, all so Bhelen can become heir to his father's throne. The subversion comes in with the fact that the main character (who ironically could also be the older sibling who got exiled) can decide to prevent him from getting the throne.
Played straight in the Human Noble Origin, where the younger son/daughter (the player character) gets left behind guarding the castle while father and older brother set off to war, and eventually ends up saving the world, accumulating riches and honors, and potentially marrying the king or queen as well, while the father dies and the older brother spends the whole story "missing in action"...
The series as a whole is an inversion. Solid Snake, the only one of the Les Enfant Terribles clones to have a decent ending, is actually the eldest of the clones, or at least the middle child (depending on whether Liquid, his twin, was born first or not).
This trope was actually referenced in an optional radio conversation with Zero in Metal Gear Solid 3: Snake Eater, where he notes the coincidence of Naked Snake and Major Raikov technically sharing the same name ("Ivan," Raikov's first name, is Slavic for "John" or "Jack," which is Naked Snake's name).
In Embodiment of Scarlet Devil, the Bonus Boss is Flandre Scarlet, the younger sister of Remilia Scarlet, the Final Boss. Flandre's immense power and emotional as well as mental instability has forced Remilia to lock her in the basement for almost five-hundreds years.
In Phantasmagoria of Flower View, all three Prismriver Sisters are playable. However, only Lyrica, the youngest, gets a story mode.
There's another case regarding the Prismriver Sisters. According to their backstory, there were originally four sisters. After their father's death, the sisters went their separate ways. However, the youngest, Layla Prismriver, summons Poltergeists in the form of her sisters, which is now the current Prismriver Sister. The original four has died, but the Poltergeists still exist until the present.
A fairly minor case in Mountain of Faith, Minoriko Aki is the Stage 1 boss, while her older sister Shizuha Aki serves as the midboss.
In Subterranean Animism, Satori Komeiji is the Stage 4 boss. Her younger sister Koishi is the Bonus Boss. Koishi, herself, even straight out states that her sister never really was all that good at fighting.
In Narbonic Dave, the younger sibling, is constantly stressing over how much cooler, better looking, etc. his older brother was, despite the numerous things he'd done that made him unique, like going to the moon. His mind is almost put at ease when his friends meet his brother though.
Artie: We decided you're much cooler than Bill. Dave: Really? Geez... You don't know how much this means! Everyone's always liked Bill more— Zeta: Oh we do like Bill better. Artie: We just think you're cool.
Set in a fairy tale world, the webcomic No Restforthe Wicked makes a bit of a running gag out of this.
Played with in a comic-only adventure of The Amazing Chan and the Chan Clan. Scooter solves the mystery and Henry comments that he "always lucks out", but he and the rest of the older kids aren't portrayed as evil or boring, only having caught the Distress Ball (they were being suspended mid-air from the top of a stage).
Inverted in its Sequel SeriesThe Legend of Korra with Older brother Noatak (AKA Amon) and younger Tarrlok in which the former is far more superior in bloodbending talent than the latter.
Out of Aang and Katara's three kids, Tenzin is the only one who's an Airbender like his father. His older sister Kya is a Waterbender like their mother, while the eldest sibling, Bumi is a non-bender just like their uncle Sokka.
While all three of The Powerpuff Girls are the same age (5), Bubbles is considered the baby of the three, and she comes out on top at the conclusion of "Three Girls And A Monster" as well as "City Of Nutsville."
Primogeniture historically was a means to keep the landed classes as they were, otherwise the tropes we now associate with them may well not have developed. The disinherited likewise could have built on the tropes of the adventurer with nothing to lose: a knight errant. However Ultimogeniture, as youngest-inherit is called, often stipulates that the youngest looks after the parents and their home while all the others are able to go out into the world and settle fortunes for themselves. Even when the inheritance was split (partible inheritance), again the youngest was often given the family manor, most often found in Scandinavia. But, like primogeniture, elder brothers could turn to theft and coercion and a potential inheritor to murder of any younger than him, so no system's perfect.
Some primates with female philopatry (female children stay in the group they're born into, males leave) have a system by which the youngest offspring has the highest rank in the dominance hierarchy.