Darwin and Gumball try to get Clayton to stop lying again, but when he proves that he can do a dangerous karate move (and successfully tries it out on Tobias), the trio must resort to lying to make Tobias look like he's conscious and pin the blame on someone else.
Tropes:
- A Lesson Learned Too Well: Darwin and Gumball teach Clayton not to lie. Because of this, when Clayton knocks out Tobias, he refuses to go along with their plan to frame Jamie, seemingly getting them in even more trouble than he is.
- Ate the Spoon: The Elmore Junior High School cafeteria food is so loaded with artificial ingredients that it melts through Gumball's tray.
- Bolivian Army Ending: The episode ends with Gumball and Darwin repeatedly attempting to knock out Clayton, Jamie, Tobias and Principal Brown after each of them realize they're going to be part of Gumball and Darwin's lie.
- Cassandra Truth: When Clayton stopped all other lies but said he could really do a "Finger Touch Heart Disintegrator", Darwin and Gumball don't believe him. They should have.
- Damned by Faint Praise: When Clayton asks for something good about himself that is true, all Darwin and Gumball can think of is that he's red and himself. He decides that last one is good enough.
- Double Standard: Abuse, Female on Male: Clayton knocks out Tobias (accidentally and through a relatively non-violent use of Pressure Points), and Darwin and Gumball get in trouble just for telling him to do it. Several different girls wallop Tobias with their books, and no one even considers that they could get in trouble for it (even Carrie, who hit Tobias so hard, she could have easily hurt him worse than Clayton did).
- Food Slap: Teri throws her water in Tobias's face when he hits on her. Since he clearly enjoyed it, Penny instead dumps her glass out in front of him. When he does the same to Sarah, she throws a piece of her ice cream body at him.
- Framing the Guilty Party: Darwin and Gumball attempt to frame Jamie for knocking out Tobias, but by getting her to actually hit Tobias hard enough to have done so. She ends up finding out before the plan goes into motion.
- Got Volunteered: Gumball is so sure Clayton is lying about his move that he tells him to do it... on Tobias.
- Hypocritical Humor: After Gumball had repeatedly hugged Clayton, Clayton tries to do the same, but:
- Idiot Ball: Darwin and Gumball marionette Tobias' unconscious body to make Carrie think he's still conscious (and hitting on her), Carrie hits Tobias, and Darwin gets the idea of making it look like a girl knocked him out. However, Carrie already hit him hard enough to knock him out (and even lift him off the ground), begging the question of why they didn't just leave Tobias where he was and let Carrie take the blame.
- Imagine Spotting: When Clayton is asked how he sees himself, we're shown his image of himself as some kind of buff warrior in pixel graphics, which Gumball and Darwin have no trouble seeing before literally bursting his dream bubble.
- Literal-Minded: Gumball asks Clayton to put his lies in a trash can, but Clayton says it's not big enough and Darwin thinks the can being porous will let the lies spill out everywhere.
- Of Corpse He's Alive: Clayton's martial arts move turns out to be true. Unfortunately it knocks out Tobias, so Gumball, Darwin and Clayton have to make it look like it was somebody else's doing.
- Selective Enforcement: After Clayton yells at the top of his lungs for ten solid seconds in the library, the librarian only shushes Gumball for a brief outburst shortly after.
- Sequel Episode: In a sense, this episode is a followup to "The Skull". Darwin and Gumball found out Clayton was a liar in said episode, and this one is about them trying to get him to quit.
- Sickly Green Glow: Darwin gets this from eating cafeteria food and thinks it's a "healthy glow".
- Too Much Information: After he learns to stop lying, Clayton still needs to work on the opposite problem.
Clayton: I've never really had a girlfriend because I'm socially awkward. Also I have glandular problems so my liver starts to smell when I get too close to a girl. It makes my mouth smell of burnt tires and hummus.
Gumball: OK! Good honesty. Little too much information, but good nonetheless—
Clayton: Also I've got a contagious rash on—
Gumball: Woah, woah, alright, I'd like to sleep this month, thank you very much!
- Twin Threesome Fantasy: A G-rated version is mentioned when Tobias recounts Clayton's claims of experience with girls.
Tobias: He once dated sextuplets—at the same time!
Gumball: Hmm... sounds complicated.
And repetitive. - Touch of Death: Clayton somehow learned from TV a "Finger Touch Heart Disintegrator" technique (for real). Fortunately, when he used it on Tobias it just knocked him out.
- Won't Take "Yes" for an Answer: When Clayton tries to explain why he lies, Gumball keeps interrupting him to tell how they're ready to support him. This goes on until the third time when Darwin shoves Gumball out of the way.
