'''Basic Trope''': A character has or encounters an identical, evil (twin) sibling/clone/other family member.
* '''Straight''': Bob encounters [[NameOfCain Kane]], his evil identical twin brother.
* '''Exaggerated''':
** Bob has ''multiple'' evil siblings who were born together with him (triplets, quadruplets, quintuplets, etc.)
** Bob encounters his AlternateUniverse self who was born in his place and DrivenToVillainy because of one minor difference in his otherwise identical upbringing to Bob.
* '''Downplayed''':
** Bob encounters Kane, his evil fraternal twin brother.
** Bob encounters Kane, his {{jerkass}} identical twin brother.
** Kane is AffablyEvil and [[EvenEvilHasLovedOnes genuinely loves Bob]], and wants to bond with his brother... by committing some unsavory crimes.
* '''Justified''':
** Bob and Kane were SeparatedAtBirth and given up for adoption. Bob had a rather normal upbringing living with loving GoodParents, while Kane was raised by a couple of supervillains (who may have even been {{abusive|Parents}} to boot).
** Kane is a [[EvilKnockoff clone]] created by [[BigBad Emperor Evulz]] to be the perfect enemy of Bob.
** Kane ''is'' Bob. Or rather, [[EnemyWithout Bob's inner darkness given its own body]].
* '''Inverted''': Kane encounters [[CainAndAbel Avel]], his ''good'' twin.
* '''{{Gender Inverted| Trope}}:''' Bob encounters Roberta, his fraternal twin sister who looks and acts a lot like him (aside from being female and, well, evil).
* '''Subverted''': Bob's supposedly evil twin turns out not to be evil.
* '''Double Subverted''': Kane was just playing a mind game with Bob. He was a bad guy all along.
* '''Parodied''':
** ''Both'' twins are evil, or one of them is a little ''more'' evil than the other.
** Every time a pair of twins show up, Alice feels the need to ask which one of them is the evil one.
* '''Zig Zagged''': Bob's twin Kane sometimes antagonizes him or commits evil deeds, but at other times he does not seem to be evil at all.
* '''Averted''': Bob doesn't have an evil twin.
* '''Enforced''': The writers want to create a new enemy for Bob, but are convinced he needs to be a much more personal nemesis for Bob than his previous adversaries.
* '''Lampshaded''': "So you're my evil twin, huh? Then where's your [[BeardOfEvil goatee]]?"
* '''Invoked''': Someone (perhaps even Bob himself) intentionally uses AppliedPhlebotinum to create an evil clone of Bob.
* '''Exploited''': Bob takes the opportunity of Kane's visit to commit a crime he's always secretly wanted to do, because people will [[FramingTheGuiltyParty blame his]] [[ImpersonatingTheEvilTwin evil twin]].
* '''Defied''': Bob's identical twin is prophesied to become his evil counterpart, so their parents do everything to instill Kane with kindness and good virtues.
* '''Discussed''': "Bob has just discovered his identical twin. I'm telling you the guy must be evil or something, no way around it".
* '''Conversed''': "In this episode Bob runs into his evil twin".
* '''Played For Laughs''': Bob and Kane keep getting into hilariously awkward situations, [[IdenticalTwinMistake as people keep mistaking one for the other]], despite their obvious personality differences.
* '''Played For Drama''':
** [[KillAndReplace Kane murders Bob, and then impersonates him while committing crimes]].
** Kane deliberately {{frame|Up}}s Bob for several crimes that he committed, causing Bob to be arrested for his brother's misdeeds.
** Kane is an AngstySurvivingTwin on a RoaringRampageOfRevenge against Bob's killers.
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%% Optional items, added after Conversed, at your discretion:
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%%* '''Implied''': ???
%%* '''Deconstructed''': ???
%%* '''Reconstructed''': ???
%%* '''Plotted A Good Waste''': ???