- If you think about it, Alan and Carmen's relationship is this. Carmen is a cactus and Alan is a balloon, but that doesn't stop them from loving each other, and attempting to kiss each other.
- The fact that even the jerkass couple characters like Margaret and Gaylord Robinson and Principal Brown and Miss Simian love each other (even if everyone else — viewers included — find it abhorrent, dysfunctional, gross, unprofessional [in the case of Principal Brown and Miss Simian], or weird) and have softer sides.
- For a more meta example, Ben Bocquelet saving all of his rejected mascots and repurposing them for a TV show. It shows that he cares about his creations like most parents care about their children and that, for all of those times he's been rejected for his ad work, Bocquelet never gave up in finding a place for them. Also an Awesome Moment, in that his rejected mascots are now part of a successful TV show instead of being thrown out or redone so they can fit into some ad executive's idea of what's good.
- Gumball and Penny's relationship in general is really heartwarming, early on they questioned whether the other liked them too shy to hang out, to Gumball saving Penny from accidentally being run over by her own father (Extra points for being dressed as a knight), Gumball's speech on how when they're together it's like time/the universe stops just for them, the aforementioned Penny standing up for him when he was embarrassed, and when Gumball encouraged Penny to break from her shell and trying to calm her down when she freaks out over her new form and runs away into the woods (extra points for Gumball calling out her father for insulting her). Pretty much everything that has to do with their relationship is adorable and heartwarming.
- Gumball and Darwin's relationship in general. If it wasn't for Darwin looking absolutely nothing like his parents you wouldn't be able to tell he was adopted; they act just like brothers. This is especially true once you've seen "The Origins" and you know how hard they (well, mostly Darwin) worked just to be together and hang out like this.
- Another one of the show's sweetest aspects is none other than with the Watterson family itself. On the surface, they're quite a chaotic bunch, but underneath that chaos is a close-knit family that look out for each other no matter what. Episodes such as "The Painting", "The Club", "The Meddler", "The Treasure", "The Finale", "The Pizza", "The Money", and "The Origins" (as mentioned above) are all the proof one needs of how strong their bond is.
- In "The Responsible", Gumball decides to take the rap for Anais flooding the house. She's so touched she hugged him and whispered "thank you". But when Gumball was about to say it, he sees his mom's eyes are on fire, so he blames it on Darwin.
- During Mr. Robinson's stellar performance, an old man leans over to his friend and asks "Whoa, who is this guy?" and Rocky, Mr. Robinson's son tells him "That's my dad. Rock on dude!"
- The ending of "The Quest", right up to where Tina's dad comes up from behind Anais, Gumball, and Darwin.
- After getting falsely arrested for robbing a convenience store in "The Spoon", Nicole still has her family celebrating her birthday with them besides her cell. The cops found her innocent after all, too.
- The end of "The Painting", where Anais asserts that, even though the drawing she made showed her father as lazy, her mother as stressed-out, and her brothers as destructive, it says "I love my family" and she meant it.
Anais: If you'd listened for a second, you'd have known that I never wanted anyone to change.Nicole: But I thought you were unhappy, honey. That painting?Anais: That painting says, "I love my family"... exactly as they are.
- Darwin comforting Gumball after he suffers a panic attack in "The Prank"... at least until it gets a little too Ho Yay.
- Penny sticking up for Gumball in "The Gi".
- Heck, the whole ending is, when Nicole realizes she should never have tried to suppress her husband's spirit and returns his cape.
- "The Cottontail Cavalier has returned!"
- Penny defending Gumball at the near end made even more sense after watching The Shell.
- The last few minutes of "The Party" are nothing but heartwarming:
Gumball: (waving good-bye and dragging Darwin) Bye, thanks for the party! I love you, Penny! *slaps forehead* WHY DID I SAY THAT?!Rachel: (blushing) Is that really the best we can do?Penny: (softly) I think he's awesome...
- Rachel thanking Darwin for cleaning up the house by giving him a kiss.
- Penny and Gumball about to share a kiss (only to be interrupted by Richard)
Richard: (whispering) I like the new one (Penny) better.Gumball turns beet red
- Finally, Richard having a nice bonding moment with his sons.
- "The Refund" has a quick moment when Richard dons his "tough guy" look: He draws a tattoo on his arm, that includes Nicole's name.
- In "The Picnic", Darwin saves Gumball from the nasty creatures of the forest.
Nobody messes with my team! (Darwin then fish-slaps one of the creatures, forcing all of them to run away!)
- In "The Mustache", Richard bought those male supplements that his kids ate by accident because he was intimidated by the internet ads. Nicole hugs him and says she loves him for who he his, and so do his kids. Given Richard's personality and the fact that he felt he was unattractive, it felt really sweet to hear his family say that about him.
- The end of "The Meddler".
Gumball: Mom, you know how I said I wanted to be my own man and make my own decisions?Nicole: Yes?Gumball: Can it just wait for a few years?Nicole: The longer the better honey. Even when you're 80 you'll still be my Gummy-puss.
- At the end of "The Helmet", Darwin and Anais successfully persuading Gumball to get rid of his lucky hat made out of tinfoil to save him from falling into the garbage crusher when he tries to retrieve it. But it's what Anais says to him that really makes it a CMOH:
Anais: Gumball, we're nothing without you.
- The end of "The Fight" when Tina and Gumball become friends after Nicole beats the crap out of Papa Rex.
- The end of Hector's rampage in "The Colossus". There's just something sweet about the way Gumball smiles at the sleeping giant, or the fact that for once everyone ends the episode happy and unscathed. Hector's mom isn't even mad.
- During the fight against Tobias to win Penny as a study partner in "The Knight", instead of claiming Penny as his, Gumball rather want Penny decide who she wants to study with and rather didn't want to fight Tobias. It shows a lot of maturity for someone like Gumball, especially someone who get jealous easily.
- Gumball even push Penny out of her father car as he almost crush into her. Showing how much he cares and loves her, even if the earlier episodes have Gumball so shy around Penny that he needed Darwin to tell Penny his true feelings for her (as seen in "The Voice").
- Gumball and Darwin hurting themselves to make it look like Banana Joe won their fight in "The Banana", followed by them making up after he wakes up. Then, after the reveal that Gumball had Darwin's pen all along, meaning the entire conflict was pointless, Joe and Darwin gently stroke his face instead of hitting him.
- Darwin kissing Carrie in the Halloween Special. Instead of being offended, she just blushed. Even better is the implication that he's wanted to do it for a while.
- What makes it all the more endearing is the Fridge Logic behind it. Being a ghost and having no physical form, Carrie's interactions with the world around her is limited, with many objects usually passing right through her unless they were ghostly objects. Darwin giving her a kiss after he and Gumball turned into ghosts themselves is most likely a first for her.
- And in the same episode, Gumball apologizing to Anais.
- The Wattersons enjoying the star that Richard accidentally purchased with all their savings 12 years ago at the end of "The Treasure".
- Gumball and Darwin trying to get in trouble so Principal Brown wouldn't have to break up with Miss Simian in "The Apology". It is especially heartwarming, considering that Gumball and Darwin either make fun of or are grossed out by Principal Brown and Miss Simian being a couple (and, in season one's "The Sock", called out their relationship as being unprofessional).
- And Miss Simian finding out they weren't trouble makers and apologizing at the end.
- In "The Flakers", Gumball and Darwin are mad at each other throughout most of the first half of the episode. Despite saying she could care less about their beef, Anais does a nice trick to bring them together again. Though, that doesn't stop her from getting a little revenge for them abandoning her at the store when they were fighting. While they are mad at first, they end up thanking her for bringing them together again and the three laugh while getting into a harmless pillow fight. It's a cute moment between the three, and anyone who grew up with their siblings would feel their heart warmed.
- The ending of "The Pony", where Gumball and Darwin return home and fulfill their promise to spend time watching a movie with Anais, who was kept waiting so long that she thought they didn't want to hang out with her. And if that alone wasn't heartwarming enough, before they start watching the movie, they ask to see her smile.
- And is probably the cutest and most heartwarming smile of the show so far.
- "The Hero": While some will argue that Gumball and Darwin mocking Richard and Nicole's cruel punishment of not letting the two eat or use anything in the house are low points, this episode does have its moments of being heartwarming, such as:
- Richard reminiscing about how Gumball used to look up to him as a child.
- Gumball crying over Richard allegedly dying while rescuing him at the junkyard.
- From "The World", there's a truly heartwarming montage of Anais playing with her Daisy the Donkey toy until the doll starts talking to her.
- Gumball telling Darwin that he's totally his brother at the end of "The Words".
- The opening credits for "The Kids" thanking Logan Grove and Kwesi Boakye (the original voice actors for Gumball and Darwin). It shows that the crew members really do appreciate those two guys for their work and are sad to see them let go due to puberty.
- Richard giving a grumpy Gumball and Darwin a "Wonder Hug" in an attempt to make them feel better in "The Joy." Too bad things go horrifically downhill from there...
- If viewed from a different perspective, this episode has the happiest plot ever. Richard's hug makes Gumball and Darwin so happy that their happiness spreads throughout the entire school, even to Miss Simian, who spends the beginning of the episode making everybody miserable just for the sake of it. It's just presented in an unconventional manner.
- In "The Extras" a colorful bird dances for a black bird but gets dejected and incredibly sad when he finds out the black bird is male. Then the black bird cheerfully tells him the dance was awesome, so he should continue anyway, and the colorful one perks up immediately.
- In "The Void," upon realizing that Molly is not only missing but has been erased from everyone's memories, Gumball and Darwin make it their mission to save her even though they can't actually remember her. Especially given that the joke of the premise is that the universe got rid of her because she was such a boring extra (she and the main characters never even talked onscreen when she was on the show), that the two become so fixated on getting her simply because she was their friend and deserves their help is very sweet.
- In "The Allergy", when Darwin tries to force Anais and Gumball to leave so they won't be hurt by his out of control sneezing, Gumball refuses to leave his brother.
- The Shell. One-third of Crowning Momentof Awesome, one-third of Tear Jerker and the remaining is in this territory:
- It says a lot of how much Penny means to Gumball that he manages to drop his usual idiocy, laziness, and cowardice—so much that he earns her dad's respect (even though later episodes like "The Spoiler" and "The Apprentice" show that Patrick is still wary about Gumball being around Penny, but he's not hostile about it like he was in such early episodes as "The Knights" and "The Date").
- Gumball reassuring Penny that, not matter how she looks, there is no way that he will not like her. He even makes an offhand joke about how she looked like a coconut with 2 holes, making clear that Gumball never liked Penny for her exterior appearance in the first place. Then he proves it by finally kissing her, changing her back to her first, and happiest normal form.
- Gumball going on a date with Penny in her shell-less form in "The Burden".
- Gumball and Darwin bonding with the school hamster after he helps them escape capture, and letting him go free.
- The Mirror has Carrie reuniting with her cursed dad after he fell out the window and died, then came back as a ghost.
- "The Man": The Wattersons throwing Granny JoJo a birthday party.
Granny Jojo: (kisses him on cheek) Don't be sillier than you already are. Your brain might stall once and for all.
- Granny JoJo actually being nice to Nicole by saying she looks average and giving Gumball, Darwin, and Anais real candy instead of trying to pass off her expired fungal medication as candy.
- Granny JoJo and Louie's entire relationship is built on sweetness.
- A flashback showing a young Richard serenading a young Nicole (until her dad catches them and Richard falls from the ladder and swallows the guitar he was playing), while the latter looks on lovingly at him.
- Richard admits that he was so harsh to Louie because he was afraid that Granny JoJo would leave him like his father did. Granny JoJo gives this in reply:
- "The Pizza": The Wattersons giving Larry $100 as a tip and apologizing for treating him like garbage, even though (a) the economy has now fallen so far that the only thing $100 can buy him is a ratburger and a kick in the teeth, and (b) they go back to treating him like dirt in later episodes.
- Despite the rampant Black Comedy and Gumball being a jerk for most of the episode, "The Saint" does have some heartwarming moments, mostly from Alan, such as when he took the fall for Gumball breaking the library computer and when he gave the homeless hairy guy (the one who appeared in such past episodes as "The DVD," "The Castle," and "The Gripes") $20, the homeless hairy guy thanks him for helping him in his time of need, and Gumball finally admitting to Alan that he's a better man (balloon) than he is.
- Plus, there's how the episode ends: Alan pretends to get pissed over Gumball making squeaking noises on the floor so that Gumball'd feel accomplished in his goal in making Alan break.
- The Friend: Anais bonding with the bizarre, shark-headed creature who has been looking for friends ever since his creator died.
- "The Society": Gumball concluding that he doesn't need to belong to a secret society since he has Darwin as his friend.
- "The Spoiler": Gumball and Penny's phone call. Penny ends up being one of the only characters in the episode who doesn't spoil anything about The Screamening for Gumball. She teases him a little but nothing more than that, assuring him afterwards that she won't give away anything. This is also the first episode to bring up their relationship since "The Mirror," when it was implied they broke up because the email curse drove Gumball to call her fat.
- Or that the episode was aired out of order since it is aired with and before "The Burden".
- Patrick Fitzgerald's appearance in the same scene. He evidently still feels the need to eavesdrop on his daughter's phone conversation and he does spoil part of the movie for Gumball, but he was only trying to be funny - friendly even - and he clearly feels bad about it afterwards. His animosity towards Gumball seems to have evaporated since "The Shell", though it did come back a bit in "The Apprentice".
- Gumball didn't take Anais to the movie because she is too young and would get scared, showing Gumball being a caring older brother.
- In the "The Triangle", Gumball thwarts Leslie's attempt to sabotage Darwin's solo at the game. Gumball eventually convinces Leslie to try to be happy for their friend's success. It turned out that Darwin botched his solo, yet the two still look at Darwin in respect as the crowd boos.
- "The Money": Richard calms down Nicole's wrath by shaping his fat into a heart (even though Richard deserved Nicole's wrath because he was the one who lost the family's money in the first place).
- Gumball and Darwin helping Rob become a better nemesis in "The Nemesis" just to make him feel better, even if someday it will come back to bite them (as seen at the end of "The Nemesis" and The Reveal of who set up the hijacking plan on "The Bus").
- In "The Others", it is nice to hear Gumball being his optimistic self by praising the amazing world they live in and he and Darwin go to prove Clare wrong by fixing her life and give her a happy ending whether she wants it or not.
- The ending of "The Signature", Frankie having a Heel Realization for leaving Richard and then coming back just to betray him and his family by taking their home. After Jojo and Louie got married which makes the latter the oldest Watterson and reclaiming home ownership and somehow reversing all the incestuous adoption that happened earlier, Richard comes to him and has him sign a paper. Frankie questions if it is a restraining order against him, Richard responds it is an adoption paper so Frankie can be a father to him again and also fix the family tree. Both reconcile and they ripped off their shirts to celebrate becoming a family as everyone including Louie joined in.
Watterson Family: We are family! Nothing rhymes with family!
- This is actually a very surprisingly mature moment for Richard Watterson and shows that perhaps, he IS capable of growing up. And he is capable of Forgiveness, in which normal people who have abandonment issues can't even do easily. Judging by Richard's memories of his father, his unwillingness to accept Louie to marry his mother, and his father's aforementioned Heel Realization, Frankie might be at least a good father to him.
- And during the first few minutes of this episode, Richard admires Louie's profound wisdom and hopes that he won't mind if he calls Louie 'Dad' note . In which turned into a Funny Moment as Tempting Fate kicks in the plot of the episode.
- And later in "The Check", despite his shortcomings, Grandpa Louie is an accepted and valued member of the Watterson family. He even participated in the family's shenanigans such as the wacky (not to mention invisible) car chase scene!
- It's surprising to see Masami have some Character Development in "The Gift", in which she reveals many hidden depths, such as being uncomfortable with her friends trying to please her when they could just appear at her birthday party to be with her at her happiest day and greet her, and even accept normal (for Masami's standards) things as gifts. She even accepted the socks that she received, in which alongside revealing that she has legs, she wears them all the time.
- In "The Comic", Sarah witnessed Gumball got mugged and she ran away with her comic in hand causing Gumball to drop out of the hero business. That was until Sarah came back with a new issue and have Gumball and Darwin to read it. It was about Laserheart fighting against Onyx, who was based on the mugger, and the Darkest Hour comes when Onyx destroys Laserheart's power source. It all seems lost until The Smoocher kisses Laserheart to restore his powers and defeat him. Gumball is more than relieved that not only did Sarah's comic cheer him up, but he also witnessed the thief getting his just desserts from Nicole. The lesson was that even after darkest moments, you never lose hope.
- After everything that happened in "The Romantic", Gumball and Penny remained together (originally, they were going to break up, but the writers scrapped that). Capped off in the ending when Gumball promises no more marriage proposals and big gestures, he tries to stop Darwin igniting the fireworks but it was too late. Penny had to witness a huge fireworks display by Gumball which tells his message that he loves her and claiming it was Gumball who sent it despite him denying it. When Gumball gives up and does a heart eye emoji face out of embarrassment, Penny just sighs and says "Oh Gumball..." with a smile on her face. Penny is well-aware that while Gumball may have been impulsive about his relationship with her, it was out of good intentions and Gumball is willing to concede for her if she doesn't like what he's doing.
- In meta sense, this episode aired exactly one year after "The Shell", where they became official.
- Even though it was all an illusion from head trauma it was quite nice to see a noble side of Gumball in "The Apprentice". Gumball knew that if he revealed that the Chanax CEO was evil, it will cause Patrick, Penny's father, to lose respect for him since he was hoping to get a job from him. But Gumball did it anyway because he was worried that the Chanax CEO might destroy a hospital to build a new highway, showing that Gumball does care about what happens to his town.
- Gumball's letter to Darwin in "The Signal", as well as them making up near the end. At least until they realize no one is driving the car.
- Gumball and Darwin trying to help Mr. Small feel like he's inspired someone and is doing a good job as a guidance counselor (despite the chain of disaster it caused) in "The Advice".
- The Origins may as well be two whole episodes built out of this trope; seeing Richard and Nicole as young parents dealing with their hyperactive 4-year-old Gumball and still being as kind and loving as they can, the astonishing lengths the two go to to hide the fact that the original Darwin (a regular goldfish) died so as to preserve Gumball's innocence, Richard buying the current Darwin from a super-shady guy in a van for $100 dollars just to keep the act up (though he'd talked the guy down to $10 before immediately raising it back up to $100), and the entire second episode consisting of Darwin's journey to get back home after accidentally being flushed. Even the explanation of how Darwin got his lungs and legs is heartwarming; turns out that he and Gumball are literally connected by their souls and can feel each other's emotional states, and Darwin feeling Gumball not give up on him coming back is what changed his anatomy and made him grow. The first time he had just crawled from the ocean and was about to suffocate when his lungs grew in, and the second was as he was about to die of dehydration in the desert outside Elmore when his legs popped out. We could say more, but then we'd have to spoiler the whole page.
- "The Love" is the definition of Heartwarming. Even gross/cringeworthy/comic moments like the vignette about how The Robinsons express their love through violence, the vignette of Sussie's parents having a romantic dinner out and gross out the other patrons, and Richard getting arrested for hugging Billy Parham, hugging Felicity, hugging the cop arresting him, hugging the judge trying him, and trying to hug the prisoners in his cell who are ready to beat him up had heartwarming moments (especially the Richard story, which ends with his family visiting him in the hospital and hugging him after his cellmates Megaton Punch him into the hospital).
- Gumball and Penny both blush singing about their own love in their part of the opening song.
- When interviewed by an off-screen reporter on why she loves Richard, Nicole struggles to come up with an answer, so she gives up finding an explanation for their love and hugs him.
- The Sun and the Moon even have a really cute and charming conversation.
- The episode ending happily, for once, by having Gumball not tell Bobert that he shouldn't fall in love with a vacuum cleaner.
- For all its dark humor and Nightmare Fuel, "The Nest" had one with Gumball being the one to say goodbye to their former pet, the evil (and pregnant) turtle, even after noting that they didn't get enough time to know each other. The Evil Turtle looked like she was about to bite him as response like in "The Puppy"... only to nuzzle against him affectionately instead.
- From "The Night": Hector's dream of being normal-sized and enjoying everything that he couldn't enjoy when he was a giant, and the implication that he has a crush on Sarah G. Lato.