->''"When it comes to Gensokyan sisters, in general the younger one is "broken""''
-->--'''ZUN''', ''VideoGame/{{Touhou}}''

In most games, if the BigBad has a sibling, it will be even stronger than the BigBad itself. Mostly these appear as {{Bonus Boss}}es, but in some cases they may serve as a plot twist. This is a natural consequence of the SortingAlgorithmOfEvil; if you find yourself fighting a bad guy's relative later on, that relative will necessarily be tougher in order to keep pace with your increased skills.

Not to be confused with the Cain half of CainAndAbel. Also, many of these are big spoilers, so read with caution.

See also AlwaysSomeoneBetter, AloofBigBrother. You might find them AvengingTheVillain.
!!Some examples are:

[[AC:{{Anime}} and {{Manga}}]]
* An AntiHero example, Nanami from ''LightNovel/{{Katanagatari}}'' is by leagues stronger than her brother Shichika. When she was younger, her father refused to train her in the Kyoutoryuu style, not because she was a girl, not because she was [[IllGirl always sick]], but because she's far too strong for him.
* A ''Manga/DragonBall Z'' NonSerialMovie is based on Freeza's stronger older brother Cooler showing up on Earth [[AvengingTheVillain to kill Goku for killing his brother]] (Goku hadn't actually killed Freeza, but Cooler didn't know that).
* The Gorgon Sisters from ''Manga/SoulEater'' and ''Manga/SoulEaterNot''. Medusa, Arachne, and Shaula are [[DangerouslyGenreSavvy savvy]], [[ManipulativeBastard manipulative]], [[MadScientist experimenting]], [[AnimalMotifs animal themed]], [[HotWitch hot]] [[NinjaPirateZombieRobot witches]] who each held the title of the [[BigBad lead antagonist]] at different periods and otherwise act to [[XanatosSpeedChess one-up each other]], [[BatmanGambit the good guys]] and [[BigBadEnsemble even more villainous factions]].
* Inverted in ''Anime/MobileSuitGundamSEED'' and ''Anime/MobileSuitGundamSEEDDestiny'', where ''Destiny''s Rey Za Burrel is the younger, less insane "[[CloningBlues sibling]]" of ''SEED''s Rau Le Creuset. Where Le Creuset was TheBigBad and sought [[OmnicidalManiac the destruction of the human race]], Rey's a WellIntentionedExtremist who believes UtopiaJustifiesTheMeans, acts as TheDragon to new BigBad Gilbert Durandal, and isn't nearly the physical threat that Le Creuset was.
* In ''Manga/FullmetalAlchemist'', the younger brother Alphonse has been always stronger than his brother Edward in combat, even before he became a suit of AnimatedArmor. On the other hand, Edward is the better alchemist and uses it in battle, too.
* For the majority of ''Manga/InuYasha'', the titular character is weaker than his half-brother and full-blooded demon Sesshomaru.

* Joe Bob Fenestre from ''Literature/{{Animorphs}}'' reveals he has a 'prime' sibling in ''The Warning''. [[spoiler:It's none other than Visser Three, main villain of the series.]]
* {{Lampshaded}} in ''Literature/HarryPotterAndTheChamberOfSecrets'' when, after Dobby tells Harry that Voldemort is not responsible for the shit hitting the fan this year, a GenreSavvy Harry asks whether Voldemort's got a brother.
* OlderThanSteam: The ''ArabianNights'' version of Aladdin has the BigBad's brother (also an EvilSorcerer, the vizier is more an ObstructiveBureaucrat in this one) as the villain of the second part, and far more powerful.

* The [[spoiler:Elder Princess Shroob]] in ''[[VideoGame/MarioAndLuigiPartnersInTime Mario & Luigi: Partners in Time]]''.
* Flandre Scarlet from ''VideoGame/{{Touhou}}'''s sixth game, ''Embodiment of Scarlet Devil'' (her sister, Remilia, is the game's last boss).
** From a much earlier game, ''Lotus Land Story'', Mugetsu is the extra stage's first boss and Gengetsu is the extra stage's second boss. Though having no last name, official material states that they are twins.
** Shizuha Aki is the midboss to Minoriko Aki's stage in ''Mountain of Faith''. They're both still ridiculously weak, though, being the bosses of Stage 1.
** And in ''Subterranean Animism'', Koishi Komeiji (Extra stage) to Satori Komeiji (fourth stage).
** In all of these cases, it's the ''younger'' sister who's stronger. Significantly so in the cases of Flandre and Koishi.
** The only exception of the stronger younger sister is Gengetsu, Mugetsu's older twin sister in ''Lotus Land Story'', who is infamous for her nigh-impossible to dodge time-out phase bullets. WordOfGod claimed that she's ''the'' strongest boss by virtue of this phase alone.
* Death and Schirach from ''RomancingSaGa''. Death is the most powerful physically and controls Necromantic magic, and Schirach has the most powerful magic of the Trio of Dark Gods. However, if you power up the BigBad to its fullest then the point is rendered moot.
* [[spoiler: Hooktail]] in ''VideoGame/PaperMarioTheThousandYearDoor'' actually has two other siblings. [[spoiler: Gloomtail, who is her brother and is basically a PaletteSwap. Bonetail is the eldest of the group and is an undead dragon lurking in the BonusDungeon.]]
** [[spoiler: Bonetail]] is actually the BigBad's ''pet'', and is a lot more difficult to beat than the BigBad is.
* ''VideoGame/FinalFantasyXI'': After defeating [[spoiler: Archduke Kam'lanaut]] halfway through the Rise of the Zilart missions, you find out that his [[spoiler: comparatively pint-sized brother Eald'narche]] is really [[spoiler: his big brother]] and serves as the FinalBoss at the end of the mission set.
* Of ''VideoGame/ResidentEvilCodeVeronica'''s Ashford twins, Alexia is the smarter and tougher one [[spoiler:as well as the BigBad in their game of appearance. Before she wakes up from a deep freeze, you're led to believe she's actually dead after finding out that whenever you see her beforehand it was her brother, at first the primary antagonist, impersonating her, so her arrival does serve as a turn.]]
** ''VideoGame/ResidentEvil5'' also does this with strong implications that [[spoiler: there's another Wesker that's more clever and less [[{{LargeHam}} hammy]] than the one we all know.]] Check the files in chapter 6-2 and Lost in Nightmares, it's sad indeed.
* In ''VideoGame/{{Mother 3}}'', [[spoiler: Claus is the Mysterious Masked Man]], and proves to be much stronger than your entire party.
* Played for laughs in ''Videogame/{{Earthbound}}.'' In Deep Darkness, there's an enemy called the Manly Fish. There's a stronger, rarer enemy called the Manly Fish's Brother.
* Rick and Nick Bruiser in ''[[PunchOut Super Punch-Out]]''.
* A variation with a different relative. In ''LocoRoco 2'', the final boss of the main game isn't the BigBad of the first game, Bon Mucho--it's his mother, Majoline.
* In ''VideoGame/RosenkreuzStilette'', Zorne Sepperin is the adoptive older sister of the BigBad, Iris Sepperin, who has inherited Rosenkreuz's godly powers.