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* Discussed and averted in ''FanFic/AnEntryWithABang[=!=]''. It takes a lot of Clancy-Earth planes working together to bring down one ''{{TabletopGame/BattleTech}}'' aerospace fighter, and that's only because they were fighting separately. The analysts realise that against a proper House or Comstar ASF unit trained to fight together, C-Earth will be in big trouble.
* Played and lampshaded over and over again in ''FanFic/UninvitedGuests'', not only with actual ninjas, but with the Espada.
* ''FanFic/ToyHammer'' refers to this as the inverse daemon effect--daemons that attempt a BattleInTheCenterOfTheMind call upon a single reservoir of warp-essence, and as they fall in battle, each survivor has more to draw from. They ''could'' attack one at a time, but that's [[AttackAttackAttack rather more strategy than their ruined minds can comprehend]].
* Inverted in [[http://www.fimfiction.net/story/109581/1/i-did-not-want-to-die/i-did-not-want-to-die I Did Not Want To Die.]]
* [[http://wharu.deviantart.com/art/Alucard-39083021 This]] FanArt of {{Hellsing}}'s Alucard.
* Averted in FanFic/ANewOrder by the Dark Kingdom. When the [[Anime/SailorMoon senshi]] start getting more competent they send multiple youma at once, which makes the battles harder.
* Done almost literally in ''[[http://ficwad.com/story/265257 Eroninja]]''. Nagato, using more efficient chakra receivers and a mind-controlled Shukaku, invades Konoha with 200 Paths of Pain. However, despite having the chakra to power them all, the bodies are lower quality and Nagato can only split his attention so many ways. So instead of six invaders [[OneManArmy each easily kage level]], it becomes more a battalion of elite jounin.
* [[FanFic/RainboomsAndRoyalty The Dashverse]]: The Mane Six have a much easier time fighting the amassed forces of [[EvilOverlord Sombra]]'s minions once they're [[StormingTheCastle stormed his castle]] than they did fighting the smaller groups they'd encountered on the way there.
* Constantly mentioned by Leo in ''Fanfic/BraveNewWorld.''
* In a ''Franchise/{{Digimon}}'' fan fiction ''FanFic/Zero2ARevision'', Umbradevimon and Demon have both invaded the Real World at the same time and [[EvilVsEvil ended up competing with each other for dominance]]. While the former uses as many as 1 million Black Gear controlled Digimon of various levels, the latter uses 10,000 well-trained Bakemon along with his Black Generals Ladydevimon, Deathmon, Marinedevimon, and Colonel Soulmon aided by his own [[HomeFieldAdvantage Archfiend Castle and the Typhoon of Flame]]. By the time Demon managed to repel Umbradevimon from the Real World, their forces dwindled down approximately the same amount as each other which means Demon easily won against Umbradevimon.
* ''FanFic/WhiteDevilOfTheMoon'' has the fight in Beryl's throne room, where a just-kidnapped Miyuki Takamachi takes on the assembled youma there (which are legitimately dangerous and cannot be permanently harmed without magic) and, due to her own fighting skill and the monsters getting into each others' way, manages to actually ''cut'' Beryl once before being overwhelmed. Double points for Miyuki being in fact a descendant of a ninja clan herself.
* In ''[[https://www.fanfiction.net/s/11518909/1/Fate-Long-Night Fate/Long Night]]'', this is justified with Robert Baratheon. As a Servant, one of his special abilities is to get stronger the more enemies he is fighting. Two enemies and his strength doubles. Three enemies and his strength triples, etc.
* In ''[[http://archiveofourown.org/works/11945166 Executive Stress]]'', the [[Anime/BattleofthePlanets G-Force]] team finds themselves accidentally [[StormingTheCastle Storming the Castle]] and become separated. Keyop, who is trying to get Security Chief Anderson and his bodyguards to safety, finds himself confronted with an elite Blackbird. The [[GenreSavvy genre savvy]] party, which has just played the trope straight with several squads of mooks, are well aware that the odds are now against them and about to attempt a [[ZergRush zerg rush]] with little hope of success when Mark fells the Blackbird from behind using his sonic boomerang. Meanwhile, Princess also plays the trope straight to reach them. The chapter title is this trope.
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