Realization

"Look here, you cheaters! We got rules around here! (cuts a player's medal off) There's no lucky medals... (runs to the rules list) ...THERE'S NO FOUR LEAF CLOVERS, NO HORSESHOES, ​NO RABBIT'S FEET!​ (examines the rules one more time) I've been horn-swallowed. (he growls as his face and eyes turn red, steam shoots from both his ears, and lightning comes out of his mouth.)"

- Yosemite Sam realising that Bugs Bunny tricked him out of his money.

During the story, some villains know the true meaning of family, love and friendship (that depends if they did redeemed themselves) while others know a way to make themselves even more evil or succeed in their schemes instead.

They come to realize on:
 * Understanding another's advice.
 * Realizing how selfish they have been.
 * Realizing that the main protagonist is still alive.
 * Realizing why the heroes protect them or care about them
 * Realizing that the main antagonist lied to them and using them.
 * Realizing that they decide to quit being evil by redeemed themselves.
 * Discovering that their villainy is exposed and that they are screwed.

Examples

 * Percival McLeach realizes that Marahute's eggs are Cody's weakness.
 * Makuta Krika realizes about Teridax's true plan behind the mission in Karda Nui, which involved all the other Makuta being eliminated.
 * Freddy Kruger tricks Jason by killing the children from Springwood, which led them to face each other at the end.
 * Dr. Flug is notably outraged when he discovers that (A) Professor Utonium is Mojo Jojo's "father" and (B) Mojo was the reason the Professor knocked Chemical X into the concoction that created the Powerpuff Girls.
 * He is also outraged when he discovers that his Universal Remote has been stolen and ends up in the possession of Rob.
 * When demanding an explanation for the delayed demolition, Scheck discovers that his villainy is exposed. When he tries to run over Arnold and Gerald, he also discovers that Grandma Gertie has stripped his car of its tires, to his shock and surprise.
 * Leonard discovers, to his horror, that he has fallen into Red's trap.
 * King Nixel ends up revealing the I-Cubit campaign to be a scam to all of Mixopolis due to Camsta filming him insulting the Mixels and broadcasting the footage to Mixopolis Stadium.

Quotes
"Wow, how smart. He got a remote control capable of altering time and space very similar to mine. But it's impossible that it's the same one, since mine is right there. [points to a display case containing a missing Universal Remote.] That's my remote?!"

- Dr. Flug discovers, to his disappointment, that the Universal Remote used by Rob was originally stolen from him before it was available for sale at the Awesome Store.

"[Celebrates by manically laughing.] The city is mine! [Grabs the closest Nixel to him by the arms and swings him around.] It’s mine, mine, mine! [Lets go of the Nixel and lets him fly off.] Weak-minded Mixels, how easy it was to convince them to give up their Cubits! Those fools! (laughs some more) (Unbeknownst to King Nixel, the Newzers are overseeing this and Camsta extends his camera towards King Nixel as his visage shows through the lens. In Mixopolis Stadium, King Nixel is being shown on the monitors as the Nixel Airship flies above the stadium.) (Major Nixel: Would you look at that! I can see you on the Jumbotron!) (The Nixel Airship flies off.) Huh? What’s that, Major? (Major Nixel, nervously alongside the pilot Nixel: Uh, nothing, Your Egregiousness! As you were saying?) (Throughout the stadium, Mixels watch King Nixel on the Jumbotron.) (laughs some more.) Oh, yes, what dolts! What dimwits! (The Mixels in the crowd become shocked.) (Combustor: Hey! That guy’s a jerk!) What dunderheads! (Continues laughing in his lair until five Nixels come up to him and stack up, with the top one whispering to him.) Huh? What? Really? Um… oh, well. Attack!"

- King Nixel ends up revealing the I-Cubit campaign to be a scam to all of Mixopolis due to Camsta filming him insulting the Mixels and broadcasting the footage to Mixopolis Stadium.

Images
NOTE: The limit is for 20 pictures only

Links

 * Realization in Heroism Wikia.