Created By: Luc on December 7, 2012 Last Edited By: Luc on December 30, 2012
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Obvious Crossover Method

A Fandom Specific Plot Crossover Opportunity

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A specific species of Fandom-Specific Plot, an Obvious Crossover Method is any method or episode that has sufficiently obvious crossover possibilities that it is regularly used to set up crossovers.

Before adding an example, think if the method has been used frequently enough to qualify as a Fandom-Specific Plot; if it doesn't, it doesn't go here.

Compare Sailor Earth (a Sister Trope of a gap in the setting that can be filled with an OC, a minor character, or, overlapping with this, a crossover character), The Stations of the Canon (which is more about the effect; this is about a possible cause).

Examples:
  • The Springtime Summoning Ritual in Familiar Of Zero
  • Buffy the Vampire Slayer has at least three:
    • The second season Halloween episode, aka YAHF.
    • Buffy jumping through a portal at the end of the fifth season.
    • The "Slayer Speculation Fic", where a crossover female character gets Called as the Slayer.
  • Kingdom Hearts as a whole, given the nature of its cosmology.
  • The Nanban Mirror (filler) from Ranma allows time-travel crossovers.
    • Also common: Ryouga wanders into another series.
  • The sliding device from Sliders.
  • Fringe has alternate world travel in the later sesaons.
  • Total Drama Island has 'what if [teenage character from another franchise] was a contestant?'
  • Touhou's Yukari Yakumo has been known to "spirit away" unsuspecting individuals from outside who she takes an interest in and take them to Gensokyo.
  • Since Doctor Who can theoretically take place anywhere in time and space, it's pretty easy for it to have crossovers with anything just by having the TARDIS land there. Even in cases where the other work's universe conflicts with that of Doctor Who, there are rare occasions in which the TARDIS travels to other universes.
  • A crossover character is the one who raises Harry Potter.
    • A crossover character winds up in Harry Potter's first year.
  • Malfunctioning Stargates from, well, Star Gate.
  • The Gate from the 2003 Fullmetal Alchemist anime. We know it leads to one parallel universe, so why not another?
  • For Western Animation in general, using the Toontown concept from Who Framed Roger Rabbit.
  • The malfunctioned slipspace portal at the end of Halo 3.
  • The Endless concept from Sandman qualifies; given the nature of the cosmology in that plot, literally every universe ever imagined has existed, and the Endless represent fundamental concepts such as Death, Desire, Dreams, and Destiny. Usually the crossover is a brief encounter between a character and either Death or Dream, in that order of probability.
  • Mortal Kombat's mythos holds that "your world is but one of many realms", allowing the title tournament to be held in pretty much any world.
  • The world of Rifts was practically built for crossovers -- one never knows where a Rift might lead.
  • Kamen Rider Decade is walking crossover bait. Hell, he's responsible for the first ever Super Sentai / Kamen Rider crossover.
Community Feedback Replies: 25
  • December 7, 2012
    MorningStar1337
    My Little Pony Friendship Is Magic has one where Twilight would somehow mess up a spell. Granted that plat may be used for other things besides crossovers. and may have beed discredited at the time of this writing. Also the Kingdom Hearts pothole was broken so i fixed it.
  • December 8, 2012
    billybobfred
    Any Massively Multiplayer Crossover with even the flimsiest justification will have one -- just apply the justification to the new work(s).

    I would say the MLP example isn't obvious enough unless she's used it to travel between worlds in-canon, or at least considered the possibility.
  • December 8, 2012
    dwarvenlord
    Ranma falling into spring of magical portal. the random great magical item that opens gates to different dimensions. the random god decides that character has to be moved to different world to do more good.
  • December 8, 2012
    elwoz
    Jenny Everywhere is a character specifically designed to be used in crossovers.
  • December 8, 2012
    SKJAM
    The Nanban Mirror (filler) from Ranma One Half allows time-travel crossovers.

    The sliding device from Sliders of course.

    Fringe has alternate world travel in the later sesaons. Stargate as well.
  • December 8, 2012
    MrRuano
  • December 9, 2012
    Luc
    Mr Ruano: Slightly different trope. Frequently winds up being the same, but The Stations Of The Canon is more about the effect; this is about the cause.
  • December 10, 2012
    MorganWick
    Compare Sailor Earth.
  • December 10, 2012
    RossN
    Total Drama Island has 'what if [teenage character from another franchise] was a contestant?'
  • December 10, 2012
    SKJAM
    I should point out that this is about in-universe methods of facilitating a crossover, rather than "common crossover ideas." Thus Total Drama Island doesn't count unless there's an in-canon device that pulls people from other time/space/dimensional coordinates to the world of TDI or vice-versa.
  • December 11, 2012
    TwoGunAngel
    Touhou's Yukari Yakumo has been known to "spirit away" unsuspecting individuals from outside who she takes an interest in and take them to Gensokyo.
  • December 11, 2012
    Luc
    Are there any objections to the definition?
  • December 11, 2012
    MetaFour
    • Homestuck introduces multiple universes, and states that the game Sburb (which exists in some form in every universe) is how the multiverse perpetuates itself. This lends itself easily to "characters from <work> play Sburb" crossover stories.
  • December 13, 2012
    Luc
    Additional question: Is Obvious Crossover Mechanism a better or worse name?
  • December 13, 2012
    Kayube
    Since Doctor Who can theoretically take place anywhere in time and space, it's pretty easy for it to have crossovers with anything just by having the TARDIS land there. Even in cases where the other work's universe conflicts with that of Doctor Who, there are rare occasions in which the TARDIS travels to other universes.
  • December 14, 2012
    dvorak
    malfunctioning Stargates from, well, Star Gate.
  • December 15, 2012
    amarielah
    • The Gate from the 2003 Fullmetal Alchemist anime. We know it leads to one parallel universe, so why not more?
  • December 19, 2012
    Surenity
  • December 19, 2012
    Tuckerscreator
    • The malfunctioned slipspace portal at the end of Halo 3.
  • December 22, 2012
    RoseBride
    • The Endless concept from Sandman sort of an obvious one, given the nature of the cosmology in that plot, literally every universe ever imagined has existed, and the Endless (being Dream and Death the most popular ones) never miss a chance to interact with them.
  • December 22, 2012
    Luc
    Could I request that, in addition to suggesting new examples, people offer criticism of the description? Or maybe, just maybe, hat this, so I can feel safe launching it?
  • December 22, 2012
    RoseBride
    You could probably add to the descrption the type of works or characters that are most likely get crossovers, or the reasons (if they offer any at all) or if there are particular works that sooner or later get to have a crossover with pretty much any other work even if they don't have the slightest thing in common, also Sturgeons Law definetly aplies.
  • December 22, 2012
    HandsomeRob
    Kamen Rider Decade is walking crossover bait. Hell, he's responsible for the first ever Super Sentai / Kamen Rider crossover.
  • December 27, 2012
    TwoGunAngel
    • Mortal Kombat's mythos holds that "your world is but one of many realms", allowing the title tournament to be held in pretty much any world.
    • The world of Rifts was practically built for crossovers -- one never knows where a Rift might lead.
  • December 30, 2012
    Luc
    Please, could somebody else either hat this or provide a specific objection, so I can either launch this or have something to fix?
http://tvtropes.org/pmwiki/discussion.php?id=ha0nz2w12xzfu5i8iua1tqsz&trope=ObviousCrossoverMethod