In "The Fridge" why does Nicole try so hard at making Gumball into a winner? Because throughout her childhood and adolescence she has always been called a loser (mostly by Miss Simian, who made fun of her from her first steps to her wedding day). So once you think about it, she just wants Gumball to not suffer the same thing she suffered from back then.
This would also explain her hyper-competitive nature and her willingness to even INJURE AND/OR BERATE others for being losers. She even tell Anais (The one she considers to "have all the good genes") to "learn how to be a good loser". Those people she mentioned in "The Fridge" who "bonded in the hospital" were victims to her monstrous will to compete with others and win by any means necessary, whether it involve hurting others or risking lives or not. AND THIS ISN'T THE FIRST TIME SHE'S SHOWN THIS KIND OF SCARY BEHAVIOR EITHER!!
Why was Gumball so caring towards Kenneth in "The Microwave", even though he was a repulsive monster? Because he was an ugly baby! He knew exactly what it felt like to be ridiculed for being born odd-looking, and so he wanted to keep Kenneth from experiencing the same thing.
Or, that could be the way that parents always see their babies as beautiful because they're their babies, no matter what they look like.
It seems weird that Clayton (the red ball of clay) would be a bad liar who only does it to make his life more interesting, but it actually makes sense when you realize that clay can be molded into whatever the sculptor wants it to be, but it's still clay no matter what.
In "The Flower" during one of Gumball's tirades about Leslie he calls him a "Self Pollinator." If you know anything about repdouction in flowers and plants, he basically just called Leslie a jack- (or jerk-) off.
When Darwin completely owns Gumball in an exhaling contest by releasing a constant, endless stream of air, why wouldn't he need to stop exhaling? He's a fish! The air was just continually flowing through his gills, so he would only need to breathe normally to continue breathing out.
In "The Club", the Wattersons have the Rejects' Club tied up at the back of their car for their scheme against Gumbal and are contemplating what to do to them: tell on their parents, spray them in honey and leave them at the zoo, or strip them naked and leave them at the mall, the club members, who are tied up and silenced, happily agree to the last one. It becomes fairly evident they realized this was as close to non-punishment as possible since they're mostly undressed to begin with.
In the same episode, Gumball tries to join his dad's Fantasy club and gets rejected. Why? Because he missed the point of the club; he was supposed to pretend to be a fantasy character like a wizard or an orc (it's not called a "fantasy club" for nothing), but Gumball had no idea what his dad was talking about when he asked "Be you orc?" and "Be you dwarf?" and just kept replying with "No". The fact he tried to join Anais' Physics club right before trying to join this one probably helps, as Anais points out "multiple types of intelligence" and says she thinks Gumball doesn't have any of them.
Nicole is at home by herself, Richard having gone to work and the kids to school. She cleans the entire house, waxes the car, 'bleached the fruit', all 5 hours before everyone gets home. Bored and frustrated, she pushes over a vase in order to have something to clean. Nicole is a cat.
In the same episode, why does Richard have such a hard time getting to his job? Because as seen in "The Job", if Richard were to get a job, the universe would collapse on itself. It doesn't just seem like the universe wants him to be late-it actually does/
In the music video for the Japanese theme of the show called "Yes/No Continue?" by Moumoon, We see the female member of Moumoon Yuka as a marionette performing the song while Gumball and Darwin dance. Why she's portrayed as a marionette? Well one reason is because she's a performer, and second because at the release of the music video, humans did not exist in Elmore until the season 2 episode "The Sweaters".
If ElmoreStream and ElmorePlus are their versions of Youtube and Facebook, shouldn't they be global websites? So why are they named to imply that they're just for Elmore? Because as shown in "The Internet", The Internet lives in Elmore. Seeing as he's incredibly narcissistic, he probably has extreme Creator Provincialism.
Remember in "The Tape" when Gumball tells Darwin that all he needs to do is be cute? What's the #1 thing people love most about kittens?
In "The Joy", Miss Simian mistakenly thought Tobias was one of the infected, since he was so colorful. This is probably why he wasn't jumped by the other infected earlier in the episode. They also thought he was one of them.
Lots of Fridge Brilliance about Penny comes into play once you learn that she's actually an Empathic Shapeshifter encased in a peanut shell. First, that you get a glimpse of her true form early in "The Shell" (she'd obviously get self-conscious about herself as soon as she sees her "scar" and promptly change form as seen from inside her eyehole) and it also makes a lot of sense that she'd admire Gumball for daring to be himself in "The Gi".
Why was Darwin immune to Jealousy in "The Flower" and yet was jealous in "The Burden" over Gumball dating Penny? It's because he already has Gumball as both a brother and best friend who's always around and is enough to make him happy. Judging from his behavior in "The Burden", this will escalate in "The Bros" because he feels nothing without Gumball.
In fact, this may be why in "The Sidekick" he's always feels that his sidekick and in his shadow. Gumball did asked him if he did this to himself, well subconsciously... he might have.
Then his fear of abandonment makes sense that Darwin was a pet before he was adopted into the family. He might have feared that if Gumball pays more attention to Penny... he would be abandoned by him like how a family gives away their pet out of loss of interest. That means Darwin might still think of himself as a pet and not as a welcomed family member. Maybe he might have experienced or see something like this before as a pet fish.
This is supported even more in "The Origins" when he watched his family try to replace him after he went missing. That's probably where his abandonment issues came from.
It would explain why he still calls his parents "Mrs Mom" and "Mr Dad". That semi-formality suggests he doesn't feel entirely comfortable being less formal with Mom and Dad.
In "The Skull", even if Clayton wasn't lying and the shock collar was turned on, it wouldn't have worked anyways since clay is an insulator.
In "The Burden", when Darwin is talking to the clump of Principal Brown's hair that he thinks is Chris Morris, Darwin angrily yells, "You don't get to judge me, Chris Morris! You're not one of my dads!" He could either be referring to his biological father (a fish) and Richard (whom he calls Mr. Dad) or, since he is a fish and most fish species reproduce by having the female lay eggs and the male swim by and fertilize them, any of the male fish that fertilized the egg he came from.
In "The Password" it turns out Anais changed the password this makes sense considering that in "The Goons" Richard explicitly said his favorite child was Darwin.
In "The Phone", Mr. Small fell asleep in his office while meditating and the candle he left burning set the room on fire. He most definitely would have died horribly in a fiery blaze if Gumball hadn't been there with the fire extinguisher.
In "The Mustache", Gumball and Darwin get rid of their black hairs they begin sprouting by removing all of their fur with tape. Sure, it doesn't sound so bad with Gumball, but Darwin is a fish, and he does the same thing.
All those times Gumball has popped Alan? Sure, it's funny until you realize this means Gumball has been trying to murder Alan for being "too perfect".
In the beginning of "The Fan" Gumball and Darwin are running to stop the Rainbow Factory from exploding... which is where their mother works. It does explode and there's no mention of any fatalities, but they may have not known that beforehand.
In "The Limit" Nicole's rage was obviously nightmare fuel. But while watching the episode this thought wandered into my head. Gumball is a blue cat just like Nicole and he's her son. So there's a strong possibility he inherited that ability... Yeah.
Though "The Vacation" shows that if anyone inherited her Unstoppable Rage, it's probably Anais.
In one episode it's revealed that the reason Anton is Made of Iron is that his parents keep remaking him in a toaster. So... what happens to the original Anton?
The events of "The Void": now that Molly is freed from that world, where will she live since her house and locker were folded into space? And how would we know she wouldn't be erased again?
Adding onto that, remember Rachel, Tobias' older sister? Considering that the staff of the show hated her and that she hasn't been seen at all since her first appearance, there could be a possibility that she's in that world as well..
To a certain extent the "world" even affected us, the viewers. When the world fixes a mistake everyone forgets about it. Plenty of viewers really had completely forgotten about Molly, meaning the world affected some of our memories of them as well.
In "The Nobody", Rob says he has no family even after he escaped the Void. This may have just been because he was still suffering from Identity Amnesia, but given the aforementioned point about Molly's house/locker/etc. still being gone, it seems the Void takes whole families at once... or that people sent there never have families to begin with.
At the end of "The Bros" we see the Fitzgerald house was caught on fire, but the family members managed to get out. So where's Mr. Cuddles?
Richard finds the Anton clones in "The Recipe" and prepares to eat them without even knowing anything about their origin. This basically implies Richard is so gluttonous that he would cannibalize children if he thought they tasted good.
Gumball and Penny's relationship has been compared to Richard and Nicole's on certain occasions. Does this mean Gumball will grow up to be a manchild like Richard? (even without an overprotective mom).
They were compared in reverse as well: Gumball to Richard and Penny to Nicole in "The Gi", but Gumball being Nicole and Penny being Richard in "The Shell". Gumball might be like Richard at times, but at least he inherited Determinator tendencies like his mother.
In "The Wicked," it's shown that Margaret is a very malicious Karma Houdini and that Mr. Robinson knows this and that there is no Freudian Excuse for why she is this way. She's also Rocky the janitor's mother, which begs the question: Has Rocky been abused by her? If not, how did he manage to escape her wrath?
In "The Origins", the 4th fish Richard buys freaks him out, so he pollutes the fish's bowl with paint, killing the fish for no valid reason.
Actually, the fish was colored different from the other three so Richard decided to paint him the same color so Gumball won't know the difference but Reality Ensues and the fish had to be flushed.
With Nicole's personality, its not hard not to see her as a flat out Abusive Parent towards her children (especially how they ran away in fear of her in "The DVD", her implied physical threats in "The Egg", all of her behavior in "The Hero" and it can almost seem she's grooming Anais to be just liker her too.