History Main / GiantSpaceFleaFromnowhere

** Weirdly enough, ''VideoGame/UltimateSpiderMan'' similarly has Rhino as the only boss who has no relevance to symbiotes (or the main plot, for that matter) at all. He's causing havoc in the city at the beginning of the game as the second boss, and after he's defeated and his mecha suit is broken, he never appears again.

--->'''Jaraxxus''':"You face Jaraxxus, Eredar Lord of the Burning Legion!" [note]There is a ten hour loop. It was 2007, people still thought that was a good idea.[/note]

* Nearly every boss in ''VideoGame/Mother3''. A notable example is Master Eddy, an animate whirlpool you fight near Tanetane Island. Of course, [[WhatDoYouMeanItWasntMadeOnDrugs considering what kind of]] [[MindScrew game this is]], you really can't complain about weirdness.

* ''VideoGame/RatchetAndClankGoingCommando'': The UFO bonus boss fight with Giant Clank. It just shows up as a place you have Giant Clank fly to in order to fight it. Why you need to fight it is not explained. Why it's even there is not explained. Absolutely nothing about it is explained. The only reason to fight it is to get the Mapper, which is a useful but optional piece of equipment.

* [[spoiler:Ishmelga]] in ''VideoGame/TheLegendOfHeroesTrailsOfColdSteel IV''. You spend the first three games trying to balance it out between the Nobles and the Reformists, with the villains flip-flopping between Duke Cayenne and Chancellor Osborne, with only rumors of a curse. Then ''Cold Steel IV'' comes along [[spoiler:and you suddenly learn that everything that has happened to date is caused by this creature, who was only very vaguely hinted at in the first two games and is only properly named nearing the end in the third. The curse? They're actually referring to this thing!]] PlayedWith, however, in that its existance has been hinted at ever since the first game [[spoiler: as the 'Great One']], but it can still feel like a punch to the face in terms of sudden reveals.

* This is always what forgotten beast attacks in ''VideoGame/DwarfFortress'' are. They attack with no warning, kill everything they find, and then promptly are killed or the fortress is wiped out.

* ''VideoGame/Pikmin2'': The Waterwraith appears in only one dungeon, and it's never really explained where it comes from (the ship says it might have come from another dimension). Olimar's notes ''also'' remark that neither he nor anyone else has no idea where it comes from, and that he almost suspects the whole encounter was a hallucination of some kind.

* ''VideoGame/Pikmin2'': The Waterwraith appears in only one dungeon, and it's never really explained where it comes from (the ship says it might have come from another dimension).

* The [[MultiArmedAndDangerous six-armed]] humanoid (named "God Vishnu" in the US version's SoundTest, but "Ashura" in the game's Fandom Wiki) in Level 17 of the SNES AdaptationExpansion of ''VideoGame/PrinceOfPersia1'' has no relevance thematically to the rest of the game. It is the only boss other than the FinalBoss with a unique BattleThemeMusic, the only enemy that doesn't appear in the manual, and the only one that doesn't swordfight you.

* The Playstation adaptation of ''VideoGame/FantasticFour'' have a really baffling example in the second stage, Central Park, where players in control of the four are battling the Mole Man's leftover mooks (mostly Moloids, some giant gorilla-things, and rock monsters for good measure) and halfway through, they're attacked by a BigRedDevil resembling ''Satan'' ('''[[https://youtu.be/abZHiUlrTSU?t=852 YES, really]]'''). The Devil can't be killed, but will try using his EyeBeams on you from the background, and after you defeat all enemies in the foreground he'll leave you alone.

* When ''WesternAnimation/TheSimpsons'' got their own BeatEmUp [[VideoGame/TheSimpsons arcade game]] made by Konami, there was only the first season to draw material from. Thus, we got such surreal bosses as [[AdaptationalVillainy an evil Werner von Brawn]], a Krusty The Clown parade float piloted by Mr. Smithers ([[AdaptationalVillainy who is also evil]] in this game), two mobsters who copied the two-player combination attacks, a Cerny-esque fire-breathing giant hiding in Moe's Tavern, a {{bear|sAreBadNews}}, an anthropomorphic bowling ball conjured by [[BattleInTheCenterOfTheMind Homer's imagination]], and a Noh Theater actor with a spear. It really says a lot when the boss that makes the most sense is [[CorruptCorporateExecutive Mr. Burns]] in a robot suit.

* Most bosses in ''VideoGame/CharlieMurder'' that are not a member of Gore Quaffer qualifies. All of them show up without explanation, [[BigLippedAlligatorMoment and most are not commented on your phone either]]. This includes a giant sasquatch, a living brain, a hamburger/human hybrid and a bloated tumor.

** Necron in ''VideoGame/FinalFantasyIX'', predominantly because he is also a ''final'' boss who appears suddenly and has no prior lead-up within the context of the storyline. Fans have come up with many EpilepticTrees concerning his relevance and existence, but nothing definitive within the game itelf is provided, and his existence is not mentioned during the ending sequence. What's more, he directly followed Kuja, a ''legitimate'' BigBad. WordOfGod says that Necron was a "thematic" final boss, acting to fight Zidane's desire to live with a being who represented total death (as opposed to Kuja, who was pretty much just deluded). The writers never actually tried to tie him into the plot, though stating he "could have" been several things, which implies that he's meant to be mysterious. This particular case is so infamous that it's common for fans of other series to refer to their trope examples as "the Necron of ____."

** ''Tag Tournament 2'' has Unknown return, but she's less [[BuffySpeak Space Flea-y]] this time around because the game confirms the EpilepticTrees floating around about her being Jun Kazama. (Well, at least for the continuity of ''Tag 2'' itself. [[note]][[AllThereInTheManual Developer materials]] indicate Unknown in the original ''Tag'' was meant to actually be Jun's sister, which was dropped when the game became [[DreamMatchGame a non-canon spin-off]]. The appearance of [[FanNickname "Junknown"]] in ''Tag 2'' is likely AscendedFanon as opposed to IKnewIt[[/note]]) Also, as a ContinuityNod to Unknown's own ending from the first ''Tag'', the wolf thingie is gone, though the arcade ending sees Unknown attacked by multiple wolf spirits after she's defeated.

** ''VideoGame/KingdomHeartsIII'' has a deep-cut BonusBoss of its own in the form of [[VideoGame/{{Einhander}} Schwarzgeist]], a secret Gummi Ship boss that has no relevance to the actual plot.

* When ''WesternAnimation/TheSimpsons'' got their own BeatEmUp [[VideoGame/TheSimpsons arcade game]] made by Konami, there was only the first season to draw material from. Thus, we got such surreal bosses as [[AdaptationalVillainy an evil Werner von Brawn]], a Krusty The Clown parade float piloted by Mr. Smithers ([[AdaptationalVillainy who is also evil]] in this game), two mobsters who copied the two-player combination attacks, a Cerny-esque fire-breathing giant hiding in Moe's Tavern, a {{bear|sAreBadNews}}, an anthropomorphic bowling ball conjured by [[BattleInTheCenterOfTheMind Homer's imagination]], and a Noh Theater actor with a BladeOnAStick. It really says a lot when the boss that makes the most sense is [[CorruptCorporateExecutive Mr. Burns]] in a robot suit.

* ''VideoGame/TeamFortress2'' FanGame ''Team Fortress Arcade'' originally has you fight against your opposite-colored equivalents one at a time as bosses, all armed with SecretAIMoves. Make it through all nine levels and you're thrown into the bonus level: [[spoiler:''[[VideoGame/Portal2 Aperture Labs]]'', where you end up fight a HumongousMecha Cave Johnson, who attacks you with [[ContinuityNod explosive lemons]] and GiantHandsOfDoom. He is invincible until you get help from Saxton Hale flying onto the screen to uppercut Cave Johnson's head off body so you can atack it. [[https://www.youtube.com/watch?v=pk1KbC6IgzE No, really]].]]

* The original ''VideoGame/ClayFighter'' has N.Boss, a being that seems to be made out of shiny orbs and whose attacks mainly consist on throwing the missiles of other characters. Nothing lampshades his appearance and the announcer doesn't have voice clips of his name, leading many to believe he was a last-minute adition. The Tournament edition of the game expands on the game story, but still there's no mention of N.Boss anywhere and the only mention of him after that is on the sequel where its said that Tiny was the one who beat him.

* In ''VideoGame/PrinceOfPersiaWarriorWithin'', a giant Griffon appears out of nowhere to fight the Prince midway through the game. While its presumed to be one of the many sand monsters created to guard the Island of Time, its radically different from all other enemies fought at this point and it gets defeated with nary ceremony.

** In most ''Kingdom Hearts'' games, the hardest {{Superboss}} (if the game has any) doubles as an EarlyBirdCameo for a character that plays a major role in the next game. ''VideoGame/KingdomHearts3DDreamDropDistance'' is the only game so far not to follow this rule, with the toughest (and only) {{Superboss}} being Julius from ''WesternAnimation/RunawayBrain''. Keep in mind this was the time Disney had even acknowledged this character's existence in ''twenty years''.

* The ending to Borderlands is lampshaded in the intro of ''VideoGame/Borderlands2'', where Marcus states that the only things the Vault Hunters found were tentacles and disappointment. Also from ''2'', the giant loader Saturn shows up with absolutely no warning at all.

** Ironically enough the PreSequel does, in fact, give the backstory to Borderland 2's Terramorpheous. As it turns out, the Thresher species is very common on Pandora's moon and an optional quest has you sending specimens to Pandora for Sir Hammerlocke.

-->'''[[AllThereInTheManual Manual Description]]:''' ''You know what? I think this pretty much explains itself. Have fun getting run over!''

* For ''VideoGame/FinalFantasyXIV'''s crossover with ''VideoGame/NierAutomata'', the final boss of the Tower at Paradigm's Breach, as well as for the [=YoRHa=]: Dark Apocalypse arc, [[EldritchAbomination Her Inflorescence]], will come off as this to those who only came into Yoko Taro's works by way of [=FFXIV=] and/or Nier Automata. For those players who've been around from the beginning since ''VideoGame/{{Drakengard}}'' and have followed the entire series, it however has dire consequences not just for the world the Warrior of Light is fighting in and for, but the rest of the universe.

** Jaraxxus is one of these. Though in this case, that's because he was summoned by an insane mage. His infinitely memable entrance however, makes him a fan favorite. The mage who summons him in this fight also appears as a GiantSpaceFlea in a later dungeon.
--->Jaraxxus:"You face Jaraxxus, Eredar Lord of the Burning Legion!" [note]There is a ten hour loop. It was 2007, people still thought that was a good idea.[/note]

* VideoGame/PizzaTower: [[spoiler:Fake Peppino. He very deliberately has no build up or foreshadowing to his existence to make his reveal that much more shocking. And even after, thanks to ''Pizza Tower'''s very minimalistic storytelling, there is exactly zero explanation offered as to where he came from, why he's there, how he came to be, whether he's artificial or was just born like that, if he's loyal to Pizzaface or a PunchClockVillain, or what the hell he even is. He's just...Fake Peppino, and he ''exists'']].

* ''VideoGame/SonicTheHedgehog'':

** In both game's cases, NONE of the bosses actually end up being Giant Space Fleas by strict definition, as all the sidestory and lore primer stuff for the franchise spells out ''EXACTLY'' why they are appearing and why they are treated as such big deals...but that is less the case if a player didn't engage with the provided material. In the IMOQ games, the Phases are all a result of The games' big bad Morganna Mode Gone breaking down due to ICannotSelfTerminate which is causing all the other bugs in the system, and turning programs part of the game's Black box AI creation files into the boss monsters by weaponizing said programs to harvest data (i.e. Human emotions, responses and consciousness) in the most hostile way possible which is what is trapping people's minds in the game to begin with. In the G.U. games, CCCorp shoving the recovered data of the Phases into player characters in an attempt to use them to create AI slaves for their own benefit(which failed disastrously resulting in them ending up in the PC's of G.U.'s Cast) actually messes up the game's black-boxed AI creation files so badly that the AIDA started spawning, and their desire for knowledge and understanding lead to all the events that follow when the most hostile AIDA started attacking players to take 'human' hosts and assimilate the data they need directly...[[spoiler:and the most hostile one of them all ending up hitting the jackpot and parasitically taking over the PC Hosting Corbenik, before it has him attack his sister, and his desire to rescue her from it leading to the following events of the storyline]]. What's thought of as the Giant Space Flea's for the games...is actually tied directly into why all of their events are even ''Happening''.

** ''VideoGame/DragonQuestMonstersJoker2'': While Leonyx is mentioned a few times in the game the True Final Boss in Joker 2 is not once mentioned by any character before his reveal just a few moments before your tasked with taking him down. And even in the context of the series his design is pretty gross and out there.

* In the [[VideoGame/PhantasyStarI first Phantasy Star]] you spend the whole game trying to reach and defeat the tyrant Lassic. Afterwards the game continues for a brief bit as you literally just have to walk a few steps to encounter the true final boss Dark Force. While the sequels expand on the presence of the Dark Force greatly, in this game it comes out of nowhere.

** In ''VideoGame/SuperMarioOdyssey'', after leaving the [[LevelAte Luncheon]] [[CloudCuckooland Kingdom]], Bowser sics a previously unseen enemy, the [[spoiler:Ruined Dragon]], on Mario. Said enemy is [[spoiler:a massive [[NonstandardCharacterDesign photo-realistic]] dragon who looks like he flew in from ''VideoGame/TheElderScrollsVSkyrim'' and is fought in a grim, crumbling arena that would fit comfortably in ''VideoGame/DarkSoulsIII'']]. No explanation is offered for where he came from or what he is.

* ''VideoGame/CybermageDarklightAwakening''. You've fought your way through all manner of gun-toting {{mooks}}, [[MechaMook killer robots]] and genetically-engineered SuperSoldiers in high-tech research labs, a crime-infested WretchedHive, the headquarters of a Megacorporation, a blasted-out battlefield, and an AbsurdlySpaciousSewer (twice) - all bread-and-butter for a FirstPersonShooter in the CyberPunk genre. Then right before TheVeryDefinitelyFinalDungeon you find yourself inside a gothic citadel with unmistakably medieval architecture, fighting off robed cultists and [[LivingShadow LivingShadows]] that wouldn't look horribly out of place in Creator/OriginSystems Inc's other game, ''{{VideoGame/Ultima}}''. Even AllThereInTheManual sheds no light on the in-universe origins or plot significance of this place.

* Some of the bosses in the ''Franchise/ResidentEvil'' series qualify:

** In ''VideoGame/ResidentEvil5'', why exactly was Wesker keeping a GiantEnemyCrab in the giant rotating elevator of his underground base? (Chris actually theorized that Wesker sent it to kill him and Sheva).