Everything Wrong With The Amazing World of Gumball Part 1: Seasons 1-3 & Comics

EWW: The Gi

At the beginning of the episode, Nicole is leaving home via the front door. With Gumball clinging to her leg, and Darwin clinging to Gumball, she drags both of them behind her
Gumball and Darwin: Please, Mom! Please?
Darwin: S'il te plaît?
Gumball: ¿Por favor?
Darwin: Bitte?
Nicole turns to face her sons as they adopt a kneeling position
Gumball: We really wanna do karate.
Gumball and Darwin: 'Olu 'olu?
Since when were Gumball and Darwin able to speak all these other languages? Or did they just learn how to say please in all of them specifically for this? +1 

Nicole: Sighs Okay....
The show skips ahead to Nicole driving her car, while Gumball and Darwin are in the backseat wearing karate uniforms
Gumball and Darwin: Yay!
Why did they wait until now to celebrate? +1

Nicole: Promise me you'll go to the lessons this time.
Gumball: Scoffs Pff. Who needs lessons? You already bought us black belts!
Another 500 dollars pile up on the meter. Then Gumball and Darwin pretend to attack each other, and Nicole sighs
Why did it add more money? if they aren't doing the lessons surely that would save money. Nicole should be relieved by this, not annoyed. +1

Gumball: Woo, yah-wah! Haa-yah! Throws the spoon at Darwin
Darwin: Yah! Catches the spoon between his fins Wahhh. Eats the cereal
Impressive...but no way he would be able to react that fast +1

Darwin: That was the best day of my life! Performing karate moves Yah! Yah! Yah!
Every student, except Penny, laughs
Awwwwww, I love that Penny is the only one not laughing here. The fact she's not falling to peer pressure and joining in with everyone else shows just how much she really does care about Gumball. -1

Masami: Hey, why don't you fight Tina?
They continue laughing
Gumball: No, no-no-no. Our karate is strictly for self-defense.
Darwin: To misuse the power in this fin would bring terrible dishonor upon our dojo.
Banana Joe: Haha, do another flip!
They laugh again
Gumball: All right, just one more. Ha, for the fans.
Gumball and Darwin are smart enough to know when they're being bullied or teased. There is no way they would hear them laughing and think they were fans. Aka, writers make Gumball and/or Darwin uncharacteristically stupid cliché +1

Nicole: Boys, come on! Time to go.
Gumball: One second, Mom! Walks up to Penny Hey, Penny! Hi-yah. Punches the air, startling her What do you think of my new style?
Penny: Mmm. Very, um...
Gumball: Impressive?
Penny: Well... I like to see you happy.
Awwwww. -1

Nicole: Chuckles nervously Everything okay at school, honey?
Gumball: Yeah, school is awesome! Especially when you're wearing one of these.
Nicole: It's just that it... kinda looked like the kids were making fun of you back there.
Gumball: Yeah... Laughing with you can sound like laughing at you.
Darwin: They even called us the karate wieners!
Gumball: I think it's because we always "wien" at karate.
Again, they aren't this stupid. There is no way they would think that everyone was being encouraging and supportive.

Writers make Gumball and/or Darwin uncharacteristically stupid cliché +2

Nicole: Faces Richard Oh, Richard, I'm so worried about them.
Richard turns around, revealing that he is also lip-syncing and air-guitaring
Richard: Why? It's a great track.
Nicole: They're obsessed with those outfits, and the kids at school are making fun of them. Looks at her sons
Nicole: You know how mean kids can be.
Nicole: Turns away from the window Richard? Sees him outside with Gumball and Darwin; Groans, then sighs
Nicole: I know they're just costumes, but if people make fun of them, they'll never get girlfriends, or a job, and in twenty years' time they'll still be living here and wearing those ridiculous karate outfits!
Why is she overreacting so much? This is just a harmless childish phase they're going through. As long they're happy there's no problem with it. Just leave them to it and give it at most a week and they'll get bored of it. Nothing to worry about +1