Massive Multiplayer Crossover
Let's see... Optimus Prime, Tyson, Master Higgins, Bomberman, Yugo, TwinBee, Simon Belmont... just to name a few.

"So many heroes from so many dimensions! This is pretty cool!"

A crossover that involves characters from more than two works of ficton. More often than not, this is a mash up of series which do not have a strict sense of continuity or a clear Universe Bible. To lessen canon-faulting, especially with series that do have strict continuity, a new 'neutral' setting is made that offers equal footing for all the characters. It also becomes more viable the farther you get from canon, such as one-time TV specials and especially video games. As Story Arcs have become more prevalent, this practice has somewhat lessened, with shifts to strict Verse building and explicit references.

This rarely occurs in live action shows, unless a production company can be formed that holds copyrights to everything. Thus, this is much more common in animated works — although you can generally expect The BBC to pull one out of somewhere when Children in Need or Comic Relief rolls around.

This trope has become increasingly common in video games, especially those involving both licensed and original properties. These games, depending on how far or how deep they mine, can have interesting effects on the fiction chosen. Many long-gone and/or forgotten Humongous Mecha shows, for example, often get a new lease on life, or even a brand-new sequel or remake, after making an appearance or two in a Super Robot Wars game. Similarly, the Fire Emblem series was finally brought over to the US to great success after two of its characters made an appearance as unlockable fighters in Super Smash Bros. Melee.

The name is a pun on the video game genre of "massive(ly) multiplayer online game".

This trope is Older Than Feudalism. The Argonautica by Apollonius Rhodius (3rd century BCE) features nearly every ancient Greek mythical hero all going on a quest to find the Golden Fleece.

Sub Tropes:

See also Power Creep, Power Seep and Story-Breaker Team-Up. All Stories Are Real Somewhere is related.

Examples with sub-pages

Examples without sub-pages

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  • A MasterCard commercial featured several food mascots (from Count Chocula to the Pillsbury Doughboy) eating dinner — with Mr. Clean doing the dishes.
  • USA Network's commercials play this for laughs, having various combinations of characters from their shows (Burn Notice, Monk, Psych, others) encounter each other and make idle conversation.
  • UK example: The Greatest Minds In Advertising Join Forces in a 2009 viral for Comic Relief.
  • The Met Life insurance company has released an ad featuring characters from "Peanuts," "Looney Tunes," Hanna-Barbera, and many other animation studios.
  • An advertising campaign for Krystal has a red-haired girl, a clown, and a guy in a creepy mask passing up their respective restaurants to get some food from Krystal.
  • The Origin promo for Toonami Asia seems to imply this, as we're shown characters from Justice League Unlimited, Ben 10, and Generator Rex all existing in the same universe, before the end of the Age of Superheroes happened.

    Anime & Manga 

    Comic Books 


    Mythology and Religion 
  • The Argonautica (more commonly known by the adaptation Jason and the Argonauts) by Apollonius of Rhodes (3rd century BCE) is one of the very first Massive Multiplayer Crossovers, arranged in what would become a fairly classic method — basically throwing one or two dozen heroes from various separate Greek myth cycles together on a boat with a common mission. This of course makes the Massive Multiplayer Crossover Older Than Feudalism.
    • Many of the same characters also appear in the story of the Kalydonian Boar Hunt - which, Depending on the Author, may occur before or after The Argonautica.
  • According to some religious studies texts, this has also gone on in many, many other myths: the most notable involve various saints meeting each other. This goes on even today.


    Professional Wrestling 
  • Dramatic Dream Team (basically a parody of American wrestling), Pro Wrestling NOAH (American style matches only with a more realistic take and a more formal presentation), Pro Wrestling Zero 1 (even more emphasis on technical matches than NOAH but have tendencies toward exaggerated gimmicks and bizarre angels), Michinoku Pro Wrestling (largely based on Mexican Lucha Libre though there are some "Japanese strong style" staples) and IWA Japan (features "hardcore" wrestlers and has strong Puerto Rican influences) all got together to do a Differ Cup, which was as odd and entertaining as that many collaborating together sounds could be.
  • In its early years, Ring of Honor was involved in a three way cross promotional rivalry between itself, IWA Mid-South and NWA Wildside. DO OR DIE II had the additions of NWA Midwest, NWA Florida, PCW, So Cal Pro and Pro Wrestling Guerilla.
  • Sumie Sakai's We Love Sabu benefit show on April 17, 2005 at the Tokyo Differ Ariake had former FMW wrestlers Masato Tanaka, Mr. Gannosuke, Megumi Kudo, Kintaro Kanemura, Tetsuhiro Kuroda, Mammoth Sasaki, GOEMON, Onryo, Hido, Shark Tsuchiya, Hisakatsu Oya, Ricky Fuji, Miss Mongol, Gosaku Goshogawara, Kaori Nakayama and Hayabusa to represent the then dormant promotion, Ryuji Ito, Necro Butcher and Daisuke Sekimoto from Big Japan, Crazy SKB and Shinobu from 666, The Apache Army's Akrangers Takashi Sasaki & GENTARO, Asian Cougar, Asian Condor, Asian Monkey, Lingerie Muto, GAMI, Fang Suzuki, Seiji Ikeda, Eddie Edwards and The Sandman.
  • In 2007, Alex Shane and Doug Williams called sixteen promotions to Liverpool England for a "King Of Europe Cup". Jody Fleisch represented 1PW, Claudio Castagnoli represented Chikara, Chris Hero represented CZW, Ryo Saito represented Dragon Gate, El Generico represented the International Wrestling Syndicate, Matt Sydal represented IWA Mid-South, PAC represented IPW:UK, Davey Richards represented Pro Wrestling Guerilla, Go Shiozaki represented Pro Wrestling NOAH, Trent Acid represented Pro Wrestling Unplugged, Martin Stone represented Real Quality Wrestling, Nigel McGuinness represented Ring of Honor, Rhino represtned TNA, Ares represented westside Xtreme wrestling, Zebra Kid represented World Association of Wrestling and Williams himself represented Premier Promotions. In addition, there were two "Taste Of IPW:UK" pre shows.
  • Vendetta Pro started hosting Casino Royale crossovers in conjunction with the Cauliflower Alley Club in 2011, which also saw the involvement of Adrenaline Unleashed Wrestling. 2014 saw collaboration between Dropkick Depression, Gold Rush Pro Wrestling, the NWA, All Pro Wrestling and ChickFight for a two night Casino Royal event.
  • Sendai Girls Pro Wrestling hosted the Dantai Taikou Flash Tournament in November 2011. Teams from JWP, Diana, REINA, WAVE, Ice Ribbon and Wonder Ring STARDOM entered it.
  • The World Wrestling League has been on a mission to facilitate them since 2012. In Bolivia, it pitted wrestlers from multiple associates such as Dominican Wrestling Entertainment and Peru's Leader Wrestling Association against locals from La Paz based New Xtreme Order at the Campeones Del Ring: Hacedores de Proezas event on June 25th, 2013. It even got representation from a non associate, Ring Warriors.
  • nCw Femme Fatales XI boasted a "Triple Main Event" featuring championships of three different women's promotions from three different countries all on the line. The Bellatrix World Title(UK), SHIMMER Title(USA) and nCw FF International Title(Canada).



    Stand Up Comedy 
  • There's a Star Trek-related comedy routine in which Mr. Spock, HAL 9000, and Obi-Wan Kenobi all appear on Jeopardy, in a mental variant of an Ultimate Showdown of Ultimate Destiny. Kenobi is declared the winner, but only because he uses the Jedi Mind Trick on Alex Trebek.
  • Stand-up comedy troupes sometimes feature a series of comedians who usually headline their own shows:
    • The Original Kings of Comedy
    • The Blue Collar Comedy Tour
    • The Comedians of Comedy

    Tabletop Games 

  • Seussical has characters from several of Dr. Seuss' books

    Web Original 

    Western Animation 

Alternative Title(s): Massively Multiplayer Crossover, Mega Crossover