Bruce's Tekken 2 and Tekken 5 endings. In the former, he smiles when a kid watches him train, then gives him a thumbs up when the kid worries after his punching bag breaks off, while in the latter, he beats up some Jerkass bullies who have humiliated a kid and stolen his gloves, then returns the gloves and says "Keep it up, kid". It cements the fact that, while he is Kazuya's Dragon, he's really a good man at heart and definitely a Friend to All Children.
Really, Xiaoyu seems to inspire a lot of Morality Pet feeling even to the most evil people. Heihachi took her in solely because she amused him, then he provided her with amenities to such an extent that Xiaoyu saw Heihachi as a grandfather. Yes, the same Heihachi who threw down his son for being weak and then shot his grandson because he has served his usefulness, he's being looked up favorably by someone (other than Kuma, who's not human).
The original King, Kuma, and Armor King may be dead, but their legacies live on through their respective adoptee, son, and brother.
Armor King bringing King out of his drunken depression and back into training for a new edition of the tournament.
King's ending. Having lost the tournament, a depressed King watches some children celebrate Christmas as he leaves gifts for the orphans. As he turns away, the children swarm him and King smiles.
Tekken Tag Tournament
Kuma's ending. It's probably the only time you'll ever see Heihachi as a kind, grandfatherly figure.
Devil's ending. This will also be the only time you'll even see Kazuya caring for Jun.
Surprising for what's usually a joke character, Paul's ending. After winning the King of Iron Fist Tournament 4 and having everything he ever wanted, he realizes that it's not him after seeing a poster of himself in Marshall Law's dojo. It then cuts to him starting up his motorcycle, he takes a longing sniff of gasoline, removes his rich shades, and mutters, "Ain't my style." He then throws them away, and drives into the sunrise.
Paul's ending in ''Tekken 4'' is perhaps his best ending in the entire series. It's one of the few times that the series seriously examined him and it's quite great to watch.
Nina's Tekken 4 ending. She has been hired to assassinate Steve, but then makes the shocking discovery that, while she was in cryosleep, she was impregnated... with Steve. Later, she aims down her sniper rifle scope at Steve, prepares to pull the trigger... but she can't bring herself to kill her son. It's one of the few times that shows Nina does have a heart, after all.
Made even better when you see that in his ending, Nina actively guns down some men who were about to kill her son.
Jin's ending in Tekken 4. In his One-Winged Angel form, he takes out both Kazuya and Heihachi and is about to take his hatred by killing the latter (which is completely justified, given what the man did to him two years before). However, he spares him after seeing a vision of his mother, Jun, realizing that Jun, wherever she is, would never approve him doing that, especially to his grandfather, no matter how evil he is.
Jin: Be thankful to my mother, Jun Kazama. (takes flight)
King's ending in Tekken 4. Although donating the fortunes of the Mishima Zaibatsu to impoverished children of the world is heartwarming all on its own, the scene that follows is even more so. After tracking down Craig Marduk to a hospital where he's being treated, King enters his room with the intent on avenging the death of Armor King. Raising his fist to end him once and for all in one fell swoop, he... notices a picture on the bedside table of Marduk with his parents. Slowly, he lets his fist down, and places said picture on Craig's chest, before leaving.
Christie's Tekken 4 ending. She is showered with journalists attempting to interview her after she has won the tournament, yet she just looks uninterested. Then one journalist questions what has helped her won the tournament. She hesitates and scans the audience, but immediately runs into and hugs the thing, or rather, the one who has helped her won the tournament: Eddy.
In Hwoarang's Tekken 4 ending, Hwoarang finally gets his duel with his rival, Jin. Hwoarang beats him, but the Korean Army officers finally catch up to him and attempt to arrest him for desertion. Jin helps Hwoarang beat the soldiers up and Hwoarang offers Jin a rematch in the next tournament. Jin can't help but smile.
Christie's and Eddy's Tekken 5 endings. They spend the tournament looking for a cure for their grandfather/master and when they do win, quickly exhaust all technologies they can to restore him into healthiness. The result? It's a success! And the ending is closed with them doing sparring again with him! Too bad, it's non-canon, and their grandfather/master does die in the following game.
Jack-5's ending in Tekken 5. Jane installs the previous Jack's memories into him and boots him up. He suddenly flies into a rampage, almost kills her... and then he remembers her and picks her up. Jane's oldest friend is back.
After years of unrequited loves, Ganryu finally finds an admirer! Guess, who? Lili! Specifically, she likes him because his Fascinating Eyebrow reminds her of her father's. Too bad that in this case, it's Ganryu who makes her affection unrequited.
This is the first game that shows that Paul does have a heart. During his encounter with Law, he first brushed him off, claiming that him being number one in the universe is first priority, despite being responsible of Forest's accident. Jerk... except when he wins against Law, he ends up assuring Law that when he's number one in the universe (or just win the tournament), he'll definitely share the prize money so Law can save his son. And judging by the ending, with him having his own shack, he looks like he's serious in this.
Julias ending counts as well. Her ending states that her research had been a failure... But then when she goes to check up on her experiments, one had finally sprouted.
In the intro, Asuka has a short Badass Adorable moment where she rescues a kitten falling from a store balcony. It's damn near impossible not to smile after watching it.
In King's interlude. Marduk conceded defeat and he offered his hand in friendship, reconciling the differences between the two.
Anna's ending in Tekken 6. It's the first time that the Williams sisters have settled their dispute for a bit and actually be real siblings for a chance (and in a classy way: by playing billiards and kicking some butt together). Lee's "Excellent!" at the end is just an added bonus.
Xiaoyu's ending in Tekken 6. Xiaoyu pleads for Jin to not take his life, however, the latter is too remorseful over what he's done. Xiaoyu rushes over to Jin and promises that she will stay by him no matter what, which prompts a hug back from Jin. Although it turns out, the whole scenario between her and Jin was just a dream and that she was really hugging Panda.
The fact that Lars might have fallen in love with Alisa. It's not stated outright for obvious reasons, but it seems that Everyone Can See It in the Tekken universe, since Jin quickly learns about it the moment that he disables Alisa's safe mode by mocking Lars for having affection for a mere android. Regardless, it gives a way different meaning to all of their previous interactions together. Then there's Lars' choice to turn Alisa in to Lee so he can fix her and, just maybe, restore her memories back...
Nina is aware of Jin's plan to sacrifice himself before everyone else does. And she is genuinely worried about the repercussion this will inflict not only on Jin himself, but to the world as well. Proof that Everyone Has Standards.
Tekken Tag Tournament 2
Many of the special tag team winposes:
In Lars / Alisa, Alisa trips herself, then Lars offers his hand to help her. A nice Continuity Nod to their relationship in Tekken 6, which is mostly ignored in the recent games in favor of Alisa's Romantic Two-Girl Friendship with Xiaoyu.
Nina, the resident Ice Queen and The Stoic, has probably the only moment where her Not So Above It All attitude is revealed if she is paired with Jin. Specifically, she gives him a suggestive wave as the two walk past each other. Coupled with her general loyalty to Jin in Tekken 6, it seems that, for once, she has managed to form a bond beyond that of her typical contractor-assassin relationship.
Nina is also the only pairing that gives Jin's Rage Mode a boost (+1), and vice versa. Make that of what you will.
In King / Armor King, the latter congratulates the former enthusiastically. This wouldn't be a surprise if it's Armor King I (King II's teacher), but this is Armor King II (I's brother) whom we're talking about. The last time they met, he inflicted a No-Holds-Barred Beatdown on King II. Seems that relationships do peach over time.
In Steve and Leo's Tekken Tag Tournament 2 endings, it's stressed again that Steve was merely a test subject of Mishima Zaibatsu, who thought him so lowly, they just gave him a codename: NT401. Yet there was one scientist who didn't think of him as just a subject: Emma Kliesen. She took him in with kindness and later reported his false death, before transferring him to be adopted elsewhere. Leo is freakin' dang lucky to have a mother like that (especially compared to the Mishimas) and really drives home just how evil whoever ordered Emma's execution is.
Lars' ending in TTT2 is both this and Funny Moment. It's about the first time in the series the Mishima actually get along. With the Kazama as well, for that matter.
Xiayou's TTT2 ending. She, Miharu, Alisa, and Panda are all at the amusement park, and Xiayou marvels that it's been a long time since it was so peaceful. A freak rainstorm causes them to take shelter, and Xiayou wonders about the meaning of life, and thinks they should come back in twenty years. Then, a rainbow comes out.
Baek's TTT2 ending. He has a flashback to the time he accidentally killed his father and breaks down, silently crying. Hwoarang comes along and sees him, and to take Baek's mind off of it, starts playing the lazy student, deliberately talking loudly about how he slept in so Baek will have something else to focus on other than his memories. Baek is visibly grateful for the distraction.
Forest Law's TTT2 ending as well. He and Paul got $100,000,000 and decided to spend it in Las Vegas, he lost all his money and understandably made Marshall mad (especially since he left without his dad's consent)... however, it turns out at the gates of Las Vegas, both of them encountered a crying family outside their burning home. On Forest's suggestion, both of them donated all their money so the family can buy a new house and cancelled their trip to Las Vegas. Yeah they did feel good afterwards.
Jun in Tag 2 had become rather cold and, going by her Animal Motifs (ravens and crows) and quotes murderous who doesn't seem to get along with anyone. However there is a special tag ending with Jin, it might depend on which version is used or how they are customized as it's hard to get, but they'll begin to walk past each other before Jun (or Jin, depending on who finishes the fight) stops, turns and gives a genuinely warm smile.
Jack-6's ending in Tag 2, 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.
Sebastian's ending in Tag Tournament 2. While driving Lili home, he tries to cheer her up from her losing the tournament with some music, only for every radio station to take about his spectacular victory in the tournament. When they arrive home, Lili has just one thing to say to him: "Congratulationsnote Félicitations."
Not only it is awesome, the fact that the one that spoke with Kazumi decades ago about having to kill Heihachi turns out to be AKUMAof all people is pretty heartwarming on its own considering what kind of fighter Akuma is. This cements further that he is theNoble Demon, willing to put aside his whole business about getting stronger and reaching new limits for the Satsui no Hadou, to fulfill a promise he made to Kazumi.