'''Basic Trope''': A good guy turns into one of the bad guys.
* '''Straight''': Bob turns to TheDarkSide to defeat his worst enemy, and stays that way.
* '''Exaggerated''': Bob turns to TheDarkSide to help him win a one dollar bet, and gleefully speeds across the MoralEventHorizon shortly thereafter.
* '''Downplayed''':
** Bob becomes one of the bad guys ''mentally'' and never actually leaves the heroes.
** Bob is a good guy turned bad, but he's almost always out of the spotlight as a villain.
** Bob becomes extremely disappointed of his allies' [[GoodIsImpotent apparent lack of results]], so he abandons them to become a [[PayEvilUntoEvil brutal]] AntiHero who still works in favor of their cause, but in a [[HeWhoFightsMonsters rather twisted and cruel way]].
** TookALevelInJerkass
* '''Justified''':
** He got DrunkOnTheDarkSide.
** The villain made him an offer he couldn't refuse.
** Bob was thrown over the DespairEventHorizon.
** Bob tried to be a good guy, but [[MistreatmentInducedBetrayal the other good guys didn't cut him any slack and treated him like dung]]. He decided enough was enough.
** He considered the entire world [[CrapsackWorld too far gone to save]], therefore, [[OmnicidalManiac destroying it completely]] would be considered a MercyKill.
* '''Inverted''': HeelFaceTurn.
* '''Subverted''':
** He's only [[ReverseMole pretending to turn to evil]], to find out what the bad guys are planning.
** Or he's just {{Brainwashed}}
* '''Double Subverted''': When [[TheHero Hiro]] confronts him on his turn to evil, Bob says he's only trying to find out what the bad guys are planning. He's lying. Or he meant to, but starts BecomingTheMask.
* '''Parodied''': Bob turns to TheDarkSide entirely because GoodIsBoring.
* '''Zig Zagged''': See HeelFaceRevolvingDoor.
* '''Averted''': Despite occasionally having to ShootTheDog, Bob remains good.
* '''Enforced''': "We need a new villain. What if a hero turned against his fellows?"
* '''Lampshaded''': "You've gone over to TheDarkSide? After all the times we've crushed them? Really?
* '''Invoked''': The villain knows Bob's weaknesses and plays on them in a BreakingSpeech to cause him to go to TheDarkSide.
* '''Exploited''': Emperor Evulz employs Bob's knowledge of the inner workings of his former organization to gain tactical advantage over the {{Fallen Hero}}'s former friends.
* '''Defied''': "You're not going to get me to betray my friends with a [[ScrewTheMoneyIHaveRules mere offer of money]] or whatever."
* '''Discussed''': "You don't need to worry about Bob [[BecomingTheMask forgetting which side he's on]]- he knows exactly what he's fighting for."
* '''Conversed''': "Is this the episode where he turns into a bad guy?"
* '''Deconstructed''':
** Bob turns to TheDarkSide, but in doing so becomes a FallenHero who finds out painfully that BeingEvilSucks.
** It is revealed that he has ulterior motives beyond good and evil for working for TheDarkSide, believing that they will better help him accomplish his goals.
* '''Reconstructed''': Now realizing evil sucks, Bob tries to [[TheAtoner atone]] for what he has done, but is promptly [[ReformedButRejected rejected]] and bitterly embraces his fallen status.
* '''Played For Laughs''': Bob joined TheDarkSide only because he has more opportunities [[LaughablyEvil to employ comedy while working for it]], in stark contrast to the seriousness of his original team.
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%% Optional items, added after Conversed, at your discretion:
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%%* '''Implied''': ???
%%* '''Plotted A Good Waste''': ???
%%* '''Played For Drama''': ???