Kazuya climbing out of the cliff his father threw him off, as a kid. Heihachi would do the same thing when Kazuya took revenge, then one ups his son by his reaction: sending a note stating, "You should have found a steeper cliff."
Paul goes through the third tournament undefeated and defeats Ogre... Sadly, Ogre transformed after he left.
In Tekken: The Motion Picture as Heihachi gives his speech Michelle throws an axe at him. He grabs it in his teeth, bites it apart, then jumps down with no ill feelings towards her and challenges her should she make it to the final challenge.
He does much the same in Tekken 6, catching the bullet when Lars shoots him.
Asuka jumping off a building on a bike to save a kitten.
Jack-6's ending in TTT2, reminiscent of the ending to The Iron Giant. Just as an asteroid is falling towards Earth, Jack-6 takes flight towards the asteroid and starts hammering away at it, only to have minimal effect. It looks like Jack-6 is about to fly away from it, only to fly towards it full throttle and uses all his power to break the asteroid into bits and sacrifices himself in the process.
Training mode is a staple of many fighting games, but this one goes beyond the call with an impressive and detailed list of options, up to and including specific moves for an opponent to use. Picture the likes of Jun, Jin, Heihachi, Angel, ect showing their specific signature moves and teaching you how to counter them: Badass Teacher does not even begin to describe it.
Bob's endings in Tag Tournament 2 certainly count. He dresses up as a superhero to protect innocent civilians from dangerous situations, using his SPEEED and WEIGHT!. Made even awesomer by the comic book style they're done in.
Hwoarang rescuing Jin in his Tekken 3 ending, and realizing that his power is all his own. Likewise, rejecting the Devil power in his Tekken 6 ending, realizing he doesn't need it in addition to wanting to be different from Jin.
Hwoarang's Tekken 5 ending. Broken and bleeding, he is still eager to fight Devil Jin. The music just adds to the whole scene.
The most awesome thing in Tekken history... There has been no paid character, stage or costume DLC for any Tekken game, to the point where Katsuhiro Harada outright announced that Tekken Tag Tournament 2 would have all its upcoming DLC released for everyone completely free.
Partially subverted with Tekken Tag Tournament 2's bonus movies and soundtracks, which WERE paid, but not essential content.
When Tekken 7 finally DID bring in paid gameplay content, Katsuhiro Harada went on record as stating the classic characters would NEVER be paid DLC, with the season pass being purely guest fighters and a bonus mode, with him expressing great regret over even that.
King's ending in Tekken 5. King is in a wrestling ring getting the crap kicked out of him in a tag team match, when he's able to make the tag to Marduk of all people. Marduk curbstomps them before he and King finish their opponents off with the Muscle Docking!
The fact that Akuma is a guest character in the update to Tekken 7.
It's also a meta example for Namco Bandai as NO ONE saw this coming as many were too focused on Akuma not having been revealed in the most recent game in the Street Fighter series. That and the Wham Shot that revealed he was the mysterious figure seen in the past trailers Kazumi was asking to kill Heihachi and Kazuya in case of her death. Again, no one saw that coming.
The E3 2016 trailer depicts the battle between Akuma and Heihachi within a burning dojo, ending with Heihachi seemingly claiming victory... only for Akuma to get up and use his Raging Demon. Heihachi takes the full brunt of it, but still gets back up from it! Keep in mind that only two others besides Haihachi survived this attack: M. Bison and Akuma's brother Gouken, but M. Bison transferred his soul into another body and Gouken was put into a coma.
When you fight Shin Akuma in Tekken 7, one 'correction' was done to his move set, in that the Raging Demon is finally LITERALLY a One-Hit Kill.
Also, for anyone that knows Akuma knows how much of a badass he is by litteraly name alone. His backstory in Tekken 7 is that he was indebted to Kazumi because she had saved his life. Whatever she did to save Akuma's life that he would be indebtted years later says wonders about Kazumi.
Heihachi's entrance at the start of the final boss battle of Tekken 4. The fever-pitch audience and the pro wrestling-style entrance ramp gives the match a big fight feel that is hard to equal.
The final boss fight of Tekken 7's story mode. After absolving to let his sins be known to the world after confronting the painful memory of killing Kazumi, Heihachi sets one last fight with Kazuya in the middle of an active volcano, complete with it being broadcast to the world. What follows is one hell of a showdown, though it's also Heihachi's Last Dance.
In addition of this, this scores one clean victory for Kazuya, who has been suffering The Worf Effect since the first game. He outlasted Heihachi at his fullest and the final blow is done not by Devil Kazuya, but Human!Kazuya... with his usual gloves already destroyed, it's just his bare fist that finished Heihachi off. And this didn't tire him, he's ready for Round Two with Akuma after such grueling battle.
Kunimitsu's ending in Tag Tournament 2. She is subdued by Yoshimitsu after a brief duel, but defeating him wasn't the goal. When he goes to sheathe his weapon after sparing her life, he finds only a twig in his hand because she successfully swiped his sword, while he was holding it, and cleanly escaped. Yoshimitsu can't help but be impressed with her newfound skill:
One for the player when they reach the highest ranking for a character from Tekken 5 onwards.
You can breathe. You can blink. You can cry. Hell, you're going to be doing all that because Negan from The Walking Dead has joined the roster of Tekken 7 as part of Season 2!
Negan's proper reveal trailer mirrors the infamous scene from The Walking Dead's "Last Day On Earth" episode, showing the cast of Tekken 7 kneeling before Negan as the Saviors watch on. Then Lars, similar to Daryl, actually tries to fight back, getting to his feet and slugging Negan in the face. The rest of the Tekken 7 fighters rise up against him only for Negan to single-handedly beat them all back down to their knees before delivering his final attack to Paul, who "Takes it like a champ", just like Abraham.