'''Basic Trope''': In a MassiveMultiplayerCrossover, a new character is added who is just as important as the others.
* '''Straight''': In a CrossOver between ''Evilzulgo'' and ''Nigo'', [[TheHero heroes]] AliceAndBob join forces with SixthRanger Colin.
* '''Exaggerated''':
** An entire new universe, populated with hundreds of new heroes, villains and creatures, is set up for the CrossOver.
** The creators make a whole new FiveManBand, since it worked with [[VideoGame/SuperRobotWars Kyosuke]] [[Franchise/KingdomHearts and Sora.]]
* '''Downplayed''': Colin is an {{expy}} of an existing character.
* '''Justified''':
** The CrossOver takes place in a universe or location that both ''Evilzulgo'' and ''Nigo'' are traveling to in order to trade with the people already living there. Of course one or two of the natives will have major roles.
** [[BigBad Collin von Greed]] caused the whole ordeal to strip mine the other universes of their resources [[LetsYouAndHimFight while they are fighting each other]].
* '''Inverted''': Two series start out as a CrossOver, then split apart. [[CanonForeigner Captain Colin appears in both.]]
* '''Subverted''':
** In the CrossOver, Colin turns out to be a DecoyProtagonist...
** Colin originates in the crossover, [[CanonImmigrant but then appears later on in Nigo alonside Bob]].
* '''Double Subverted''':
** ...then promptly [[SpotlightStealingSquad steals the show]] when the TheManBehindTheMan turns up.
** However, this appearance is not canon.
* '''Parodied''': Colin is an insufferable [[TheScrappy Scrappy]], even to the canon characters. Eventually, he contributes nothing to the plot.
* '''Zig Zagged''':
** There are multiple story threads (or even multiple games), not all of which feature original characters. One thread might even ignore the series involved in the crossover to be set entirely in the newcomers' universe instead.
** The original crossover has several original main characters, each of which becomes a mainstay for any one of the involved series or never shows up again.
* '''Averted''': Only previously-canon characters are a part of the CrossOver.
* '''Enforced''':
** The fans are a notorious BrokenBase. Having a new hero to focus on [[FandomRivalry prevents arguments between the two fandoms.]]
** It's a Massive Multiplayer BackdoorPilot.
* '''Lampshaded''': ???
* '''Invoked''': ???
* '''Exploited''': ???
* '''Defied''': The writers decide against adding Colin for various reasons, and insist having just the canon characters from both series.
* '''Discussed''': ???
* '''Conversed''': ???
* '''Deconstructed''': Colin's presence causes tension between [[DefrostingIceQueen Alice]] and [[HotBlooded Bob.]]
* '''Reconstructed''': ... But eventually they settle into a PowerTrio with Alice as Ego, Bob as Id and Colin as Superego.
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%% Optional items, added after Conversed, at your discretion:
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%%* '''Implied''': ???
%%* '''Played For Laughs''': ???
%%* '''Played For Drama''': ???