Never Trust a Villain

Sometimes in the Movies or T.V. Shows, a heroes or heroines trust the main antagonist in the beginning or the middle until the villains reveal their true nature and the heroes feel betrayed or angry after they trust them that they were noting but a Pawn that they were just Manipulator them to do their bidding.

Like for example:
 * Know each other since childhood until they got jealous of the heroes which that make them evil. Problems that caused the character jealous ranges from love issues, rivalries to be the best, etc. In some case, a character whom became evil was not always turned to the dark side by their own terms, but could also out of influence of other villains, usually from the Big Bad themselves.
 * The main antagonist don't come until later while pretending to be nice with the main protagonist and after they done being nice with them, they go back to be evil to rule the world, etc. In some cases, the hero' allies or even an enemy whom hero fought/captured later warns him/her about the said antagonist's true nature, which made him/her realized that the main antagonist are not worth to be trusted.
 * Sometimes the main antagonist started out as nice until something happened where they turned evil much later in the story. The said incident would be varies depends on the plot itself. For example, Norman Osborn at first until some accident have turn him into The Green Goblin which it makes him evil and try to control it until the evil side have take over him or Harry Osborn was nice at first until he realize that his father died by Spider-Man (which he didn't know that he was killed by his glider) which it make him evil and drinking too much.

Examples

 * Warren T. Rat tricks Fievel Mousekewitz into knowing where his family is, and leads him to Moe's sweatshop.
 * King Candy tricking and lying to Wreck-It Ralph about what happens when Vanellope wins the race.
 * Prince Hans lies to Elsa about Anna's death.
 * Weevil Underwood deceiving Yugi Muto and tossing Yugi's Exodia cards into the ocean during the boat ride to Duelist Kingdom
 * James McCullen decieving NATO to make them believe he has sold them his nanomite warheads, until the G.I. Joes realize he is trying to steal the warheads back. This in turn leads to Zartan convincing the people he is the US President and the Joes are terrorists.
 * James T. Kirk at first, trusting Alexander Marcus whom help him to avenge the deaths of his superiors at the hands of Khan. However, thanks to his decision to put aside the vengeance and decided to arrest Khan and having the villain to put onto the trials instead, this allowed Khan to warn the hero about Marcus' agenda.
 * Weevil Underwood tricking Yugi Muto into giving him the Exodia cards and tossing them into the ocean during a boat ride to Duelist Kingdom.
 * Snow White being tricked by the Queen/Hag into eating the Poisoned Apple.
 * AUTO shows Captain B. McCrea the message for the Axiom which was recorded in the year 2110.
 * Scar tricks Simba about the Elephant Graveyard but secretly orders his hyena henchmen to kill him and Nala, and then tricks Simba into thinking he killed his own father, but orders his nephew to run away.
 * Tirek urges Discord to join forces with him
 * Zaheer lies to Korra to set the airbenders free, but it was the ruse to killed her personally.
 * Lotso leaves Woody and his friends to die, despite being saved by them.
 * Mother Gothel lies to Rapunzel about the outside world being dangerous to keep her inside the tower for her selfish needs.
 * Mortimer has Zoey Jeremiah to take her sons Jason and George to the grocery store, so he can blame them for shoplifting.
 * Tabitha Harperstein lies to Edward Waltrip that a gang of burglars killed his family.
 * Coco LaBouche lies to her boss Mr. Yamagushi about being engaged to a man with his own child, later seduces Chas Finster.
 * Percy betrayed by Diesel 10 who invades the SteamWorks.
 * Jill Young runs into Andrei Strasser but doesn't recognize him as the poacher who murdered her mom and Joe's.
 * Caramel Man 004 is manipulated by Dr. Mashirito
 * Unalaq lies to Korra so she copen the spirit portal at the North Pole.
 * Cliff Vandercave tricking Fred Flintstone into signing firing notices for all the quarry workers.
 * Bill Cipher tricks Dipper to give him his body.
 * The Sultan hypnotized by Jafar, who is manipulating him for his own evil and selfish gains.
 * Peridot being betrayed by Yellow Diamond, Peridot didn't want to destroy a Earth. After she called her yellow diamond "Clod".
 * Royce warned Isabelle not to too kind with Edwin because he's not like what he seemed among them and the others whom sent to Game Preserve Planet by Predators, in which she ignored him until Edwin unexpectedly incapacitated her with poison-coated scalpel. Reasons why Royce warned her about this previously was due to him aware that they and the others were sent due to them capable to be the ruthless killers, and he himself has predicted that Evin would only revealed his true color once he had a chance.
 * Lysandre lies to Alain about wanting to use Mega Evolution energy for peaceful purposes when he was actually planning to use it in order to control Zygarde. He also lied to Mairin about taking care of her fatally ill Chespin when in reality, he had no intention of helping it when Mairin realized his true colors.

Quotes
"(Jenner: Mrs. Brisby, a thousand pardons, my dear. Forgive the ill-temper of my colleague. It would be an honor to assist Jonathan's widow in any way. We are but your humble servants.) (He smiles wickedly) Thank you."

- Jenner tricking Mrs. Brisby into helping her. "(Warren T. Rat: Well, well, well. Rat's the name, Warren T. Rat. What can I do for you, kid?) I'm looking for my family. (Warren T. Rat, padding on Fievel's head: Hey, you've come to the right fella, kid.) (He walks out to the exit.) (Warren T. Rat: I know exactly where they are. Come with me.) But Henri said I'd find them here. (Warren T. Rat: Have it your way, kid. Remember what Shakespeare said: And I quote--) (He clears his throat) (Warren T. Rat: Opportunity knocks but uh...but, uh...) (Digit whispers in Warren's ear) (Digit: Psst, once!) (Warren T. Rat: "But...but once! Taken at the tide t'will lead to fortune. If denied, t'will never return.) Do you really know where my family is? (Warren chuckles with sinister glee.) (Warren T. Rat: Trust me, eh? Trust me.) (Later, at the sweatshop) (Warren T. Rat: Come with me.) (Fievel races to the cup elevator.) (Warren T. Rat: Hey, hey, hey, don't break a gut there.) (The cup goes up.) (Warren T. Rat, reciting: "O! Pardon me, thou bleeding piece of Earth, that I am meek and gentle with these butchers.") (He opens the door.) (Warren T. Rat: This is where they are.) Papa! (Moe grabs Fievel and laughs maniacally. Warren comes in.) (Warren T. Rat: Not bad, huh, Moe? A new worker.) What about my family? (Warren T. Rat: You don't need a family, kid. You got a job here.) (He turns to Moe.) (Warren T. Rat: Just send me his salary, will ya?) (He leaves)"

- Warren T. Rat tricking Fievel Mousekewitz into knowing where his family is. "(Tabitha: Your family is dead, Edward.) (Edward looks at Tabitha, and Barry growls at her.) What do you mean? (Tabitha: A gang of burglars killed your family. I tried to save them, but it was too late.) (Edward gasps in shock) (Tabitha: I'm sorry I didn't make it.) What should I do, Ms. Harperstein? (Tabitha: If I were you Edward, I'd run away to an orphanage until someone adopts you.) (Tabitha leaves with an evil smirk on her face.) Oh, my family! (He begins to cry for the loss of his mother, father and older sister.)"

- Tabitha Harperstein lying to Edward Waltrip about what happened to his family. "(Zoey is talking to Mortimer on her phone.) Well, it's nice outside, and I was like "I'm going to spend the whole day with my husband." (Mortimer chatters on phone.) Yes, I'm going to take Jason and George to the grocery store. They need to get out of the house. (Mortimer chatters on phone.) Okay, I'll see you later. Thanks, Mortimer. (Zoey goes outside to tell the boys.) Hey, boys. (Jason Jeremiah: Mom, what's going on?) Dad and I are going shopping, and I'm taking you boys with me. You boys need to get out of the house. So don't forget your wallets, and your phones, alright? (Jason Jeremiah: Okay, no problem.) (George Jeremiah: Whatever you say.) We'll leave in about 30 minutes."

- Zoey Jeremiah being used by Mortimer to take Jason and George shopping. "(King Candy: All I ask is that you hear me out.) About what? (King Candy: Ralph, do you know what the hardest part about being a king is? Doing what's right. No matter what.) Get to the point. (King Candy: Point being I need your help. Sad as it is, Vanellope cannot be allowed to race.) Why are you people so against her? (King Candy: I'm not against her! I'm trying to protect her! If Vanellope wins that race...) (As King Candy speaks, we see the whole story what Candy is saying.) (King Candy:...she'll be added to the race roster. Then gamers can choose the racer's avatar.) (Moppet Girl chooses Vanellope, and the kid begins to glitch.) (King Candy: And when they see her glitching and then get glitching in just being herself, they'll think our game is broken.) (Mr. Litwak puts up an "Out of Order" sign on the game screen.) (King Candy: We'll be put out of order for good.) (Mr. Litwak pulls the game's plug.) (King Candy: All my subjects will be homeless.) (The Sugar Rush characters ran out screaming.) (King Candy: But there's one who cannot escape because she's a glitch.) (Vanellope tries trying to get out of the game.) (Vanellope: Help! Somebody help me!) (King Candy: And when the game's plug is pulled...) (Vanellope, disappearing into the game's darkness: NOOOOOOOOO!!!!) (King Candy:...she'll die with it.) (The scene changes back to the present.) You don't know that will happen. The gamers could love her. (King Candy: And if they don't?) (Ralph sadly sits down on a gumball.) (King Candy: I know it's tough, but a hero has to make the tough choices, don't they? She can't race, Ralph, but she won't listen to me. So can I count on you to talk a little sense into her?) (Ralph nods.) (King Candy: Very good. I'll give you two some time alone.) (Candy leaves Ralph alone with Vanellope, but drives away in his kart.)"

- King Candy lying to Wreck-It Ralph about what happens if Vanellope wins the race. "(Hans: Elsa! You can't run from this!) Just take care of my sister. (Hans: Your sister? She returned from the mountain weak and cold. She said that you froze her heart.) (Elsa realized what she had done) No. (Hans: I tried to save her, but it was too late. Her skin was ice, and her hair turned white. Your sister is dead...because of you.) No. (She turns around, and collapses on the ground, sobbing.)"

- Prince Hans lying to Elsa that Anna had died. "Why can't I go outside? (Mother Gothel: The outside world is a dangerous place, filled with horrible, selfish people. You must stay here, where you're safe. Do you understand, flower?) Yes, mommy."

- Mother Gothel lying to Young Rapunzel about the outside world being dangerous. "I should've listened to my mother. She always said "Never trust a Martian.""

- Cecil Turtle, upon being betrayed by Marvin the Martian.

"(Witch: And because you've been so good to poor old granny, I must share a secret with you. This is no ordinary apple. It's a magic wishing apple.) A wishing apple? (Witch: Yes! One bite, and all your dreams come true.) Really? (Witch: Yes, girlie! Now, make a wish, and take a bite.)"

- Queen Grimhilde disguised as the witch tricking Snow White into giving the poisoned apple. "(Cliff Vandercave: Leaving early?) Actually, the wife and I were gonna have dinner tonight at Cavern on the Green. (Cliff Vandercave: Ooh, pricey. Be sure to put that on your expense count. Fred, before you go--) (He pulls out firing notices and places them on Fred's desk.) (Cliff Vandercave:--would you mind chipping your "X" on a couple of these?) Yeah, sure. What are they? (Cliff Vandercave: Well, you sign these, and your buddies down in the quarry get some much-needed time off.) No kiddin'! Well, I guess Mr. Slate finally noticed all those memos I've been sendin' in. (chuckles) I hope the guys will know who's to thank for this. (Cliff Vandercave: I'll make sure you get all the credit.) (When Fred sat down, Cliff leaves his office, and Fred begins to sign the notices.)"

- Cliff Vandercave tricking Fred Flintstone into firing his workers from the quarry.