History ShoutOut / IdolShowdown

** Korone is M. Bison from ''VideoGame/StreetFighterII''. This doubles as a MythologyGag, as Korone used M. Bison as her main when she learned ''VideoGame/StreetFighterV''.

* Among the cosplay options that can be unlocked for Ina include [[VideoGame/{{Splatoon}} Callie and Marie]], as well as [[Music/{{Vocaloid}} Hatsune Miku]].

* The "Defeated" online sticker featuring Jurard T. Rexford has him in the memetic [[Franchise/DragonBall Yamcha Death Pose]].

* The rendition of "[=Q&A=E=]" used in-game is identical to the instrumental of "Paintbucket," a bonus song in ''VideoGame/HoloFunk''. Both games share the arrangement's composer, [=GGalactigal=].

** Ollie is Squigly from ''VideoGame/{{Skullgirls}}''

* A few of the attacks are similar to attacks seen in the ''VideoGame/MarvelVsCapcom'' series:
** Both of Robocos' assists are similar to attacks used by Doctor Doom. Hi-Spec Missiles Off-Collab is a reference to Doctor Doom's Hidden Missiles from ''VideoGame/MarvelVsCapcom3'' (though Roboco's version can't be spammed and doesn't have as many hits), and her Hi-Spec Beam Star Call-in is similar to Dooms' Plasma Beam attack.

** Kiara's SPARKS is reminiscent of Captain Americas' Charging Star attack.
** Marines' Star Call-in, the Aquamarine, is a reference to [[VideoGame/MarvelVsCapcom2 Ruby Hearts']] Pare-Tonn're super (though the Aquamarine doesn't fire as many times)

* The victory markers are Golden YAGOO's, based on the digital trophy used for hololive's ''VideoGame/{{Taiko no Tatsujin}}'' competition. They are also an accessory you can find within the Virtual Frontier mode.

** Kiara's SPARKS is reminiscent of Captain Americas' Charging Star attack

* Roboco's Hi-Spec Missiles Off-Collab is a reference to Doctor Doom's Hidden Missiles from ''VideoGame/MarvelVsCapcom3''. Roboco's version can't be spammed, and doesn't have as many hits.
* Speaking of ''VideoGame/MarvelVsCapcom'', Botan's Super Star Attack is a big shout-out to [[VideoGame/MarvelVsCapcomClashOfSuperHeroes Jin Saotome's Blodia Vulcan Hyper Combo]]. It's named "Get To Da Choppa!", which is one of the most iconic lines from ''Film/{{Predator}}''.

* Coco's white and red palette bears the same colors as Kiryu Kazuma, her favorite character in ''VideoGame/LikeADragon''. In that same vein, her standing heavy attack is a variation of the iconic "Kiryu Kick," which is also re-created in her character art. Even her Super Star Attack is named Essence of True Form: Just Like a Dragon.

* Sora's zoning play style is a combination of parts of I-No and Venom's move sets in the older ''VideoGame/GuiltyGear'' games. Also, her VFX Calibur is visually reminiscent of Love Heart's sword attacks from ''VideoGame/TheKingOfFightersXIV''.
* Speaking of ''Guilty Gear'', Fubuki's forward heavy and down heavy attacks are less flashy versions of Ky Kiske's moves. If you use her 6th cosplay, the similarities become even more obvious.

* One of Pekora's Specials appears to be frame-for-frame [[VideoGame/StreetFighterII Balrog's Turn Punch]].
* Ollie's Super Star Special, COLLECTOR'S REVENGE!!!, is pretty much framed like Akuma's Raging Demon.

** In a bit of a twist Ollies' ''third'' Cosplay is of a non-hololive [=VTuber=], that being Ironmouse from ''WebVideo/VShojo''. Her 5th is that of her alternate self, Olivia.

* The Virtual Frontier Collection room has a box for Holopoly, an item from ''VideoGame/DeliveringHope'' that gives one of four random effects.

** Aki is Morrigan from ''VideoGame/{{Darkstalkers}}''.

* The victory markers are Golden YAGOO's, the MetalSlime from ''VideoGame/HoloCure''. They are also an accessory you can find within the Virtual Frontier mode.

* Coco's white and red palette bears the same colors as Kiryu Kazuma, her favorite character in ''VideoGame/LikeADragon''. In that same vein, her standing heavy attack is a variation of the iconic "Kiryu Kick." Even her Super Star Attack is named Essence of True Form: Just Like a Dragon.

* The Gang City stage features randomly chosen movie posters in the background featuring the other holo-members, some of which that reference other media:

* Coco's white and red palette is the same colors Kiryu Kazuma wears, her favorite character in ''VideoGame/LikeADragon''. In that same vein, her standing heavy attack is a variation of the iconic "Kiryu Kick." Even her Super Star Attack is named Essence of True Form: Just Like a Dragon.
* Risu's Non-stop Nuts Off-Collab, along with referencing Risu's yearly antics during the month of November, is a reference to Oro's Tengu Stone Super Art from ''VideoGame/StreetFighterIII''. The only differences are that the nuts have to reappear after they've been used, and there's no EX version.
* In another ''VideoGame/StreetFighterIII'' reference, one of Sora's moves is the A-egis Reflector, which is named after Urien's Aegis Reflector Super Art. However, it's only useful for reflecting projectiles and counterpoking, with no extra combo or unblockable properties. Also, Kiara's HINOTORI Off-Collab is basically the Aegis Reflector. However, Kiara's version has no extra features, and she follows you around instead of staying stationary.

* [[AssistCharacter Aki's summoning and use of Mukirose]] is one big shout-out to ''Manga/JoJosBizarreAdventure'', particularly how [[FightingSpirit Stands]] functioned as a gameplay mechanic in ''[[VideoGame/JoJosBizarreAdventureHeritageForTheFuture Heritage for the Future]]''.

* Most of the 5th Cosplays are either references to non-fighting game characters or non-Hololive [=VTubers=].

* The victory markers are Golden YAGOO's, the MetalSlime from ''VideoGame/HoloCure''.

* Coco's white and red palette is the same colors Kiryu Kazuma wears, her favorite character in ''VideoGame/LikeADragon''. In that same vein, her standing heavy attack is a variation of the iconic "Kiryu kick". Even her Super Star Attack is named Essence of True Form: Just Like a Dragon.
* Risu's Non-stop Nuts Off-Collab is a reference to Oro's Tengu Stone Super Art from ''VideoGame/StreetFighterIII''. The only differences are that the nuts have to reappear after they've been used, and there's no EX version.
* In another ''VideoGame/StreetFighterIII'' reference, one of Sora's moves is the A-egis Reflector, which is named after Urien's Aegis Reflector Super Art. However, it's only useful for reflecting projectiles and counterpoking, but no extra combo or unblockable properties. Also, Kiara's HINOTORI Off-Collab is basically the Aegis Reflector. However, Kiara's version has no extra features, and she follows you around instead of staying stationary.

* Fubuki's gimmick, meanwhile, brings [[Franchise/TheKingOfFighters Shingo Yabuki's Critical Hits]] to mind.

* Speaking of Marvel vs. Capcom, Botan's Super Star Attack is a big shoutout to [[VideoGame/MarvelVsCapcom2 Jin Saotome's Blodia Vulcan]] Super. It's named "Get To Da Choppa!" which is one of the most iconic lines from ''Film/{{Predator}}.''
* Aki's Bottom's Up super begins with the Rose-tai rushing the opponent en-masse, a la [[VideoGame/MarvelVSCapcom2 Tron/Servbot's Lunch Rush super]].

** Sora is Athena from ''Franchise/TheKingOfFighters''.

** Botan is Noel from ''VideoGame/BlazBlue''.

* Most of the 5th Cosplays are either references to non-fighting game characters or non-Hololive [=VTubers=]
** Korone's is of the titular ''Franchise/SonicTheHedgehog''. This doubles as a MythologyGag, as Korone is an official brand ambassador for the franchise in Japan.

** Sora and Suisei's are Tsukino Mito and Inui Toko from ''WebAnimation/{{Nijisanji}}'' respectively.
** Coco's is Melody from ''WebVideo/VShojo''

* Aki's summoning and use of Mukirose is one big shoutout to ''Manga/JoJosBizarreAdventure'', particularly ''[[VideoGame/JojosBizarreAdventureHeritageForTheFuture Heritage For The Future]]''.

* Mio's Full Power Flaming Punch is a combination of two different moves used by fighting game "wolves": [[VideoGame/{{Darkstalkers}} Jon Talbain's Beast Cannon]] and [[VideoGame/FatalFury Terry Bogard's Burn Knuckle]]

* Mio's Full Power Flaming Punch is a combination of two different moves used by fighting game "wolves": [[VideoGame/{{Darkstalkers}} Jon Talbain's Beast Cannon]] and [[VideoGame/FatalFury Terry Bogard's Burn Knuckle]]

* The victory markers are Golden YAGOO's, the MetalSlime from ''VideoGame/HoloCure''.

** Uruha Rushia's black and red silhouette resembles the teaser poster of ''Film/ShinGodzilla''.

* Uruha Rushia's silhouette resembles the teaser poster of ''Film/ShinGodzilla''.

* Fubuki's gimmick, meanwhile, brings [[VideoGame/TheKingOfFighters Shingo Yabuki's Critical Hits]] to mind.

* Speaking of Marvel vs. Capcom, Botan's Super Star Attack is a big shoutout to [[VideoGame/MarvelVsCapcom2 Jin Saotome's Blodia Vulcan]] Super. It's named "Get To Da Choppa!" which is one of the most iconic lines from ''{{Film/Predator}}.''

* Most of the 5th Cosplays are either references to non-fighting game characters or non-Hololive [=vTubers=]

* Aki's summoning and use of Muki Rose is one big shoutout to ''Manga/JoJosBizarreAdventure'', particularly ''[[VideoGame/JojosBizarreAdventureHeritageForTheFuture Heritage For The Future]]''.

** Most of the 5th Cosplays are either references to non-fighting game characters or non-Hololive [=vTubers=]