Mario refuses to behave and gets grounded.
Karen is fired from her job at Starbucks after one too many mishaps, with nothing to do but tend to her kids. She lands a job as a house cleaner for the Mario Bros, where Mario is wreaking havoc beyond Luigi's control. Can Karen help him curb the plumber's behavior with her own parental experience?
Originally titled "The Naughty Boy That Wouldn't Behave".
- Anything but That!: Zack isn't phased by Karen grounding him until she takes away his Roblox privileges. Ditto Mario when Luigi grounds him.
- Big Brother Bully: Zack.
- Bratty Half-Pint: Zack is easily the troublemaker of Karen's three children.
- A Day in the Limelight: Karen is effectively the protagonist of this episode, where her home life is shown for the first time. She's even fully voiced as opposed to the usual Femscout voice clips.
- Double-Meaning Title: What the episode's title was originally meant to be, as "The Naughty Boy That Wouldn't Behave" indicated both Zack and Mario.
- Extreme Doormat: Luigi's main problem is his incapacity to stand up to Mario and stop him in his tracks. With Karen's encouragement however, he is able to finally put his brother in his place.
- Manchild: As the result of a sugar rush, Mario's behavior here is roughly equivalent to an unsupervised 5 year-old, with Luigi acting as the parent vainly trying to control him.
- Mean Boss: Karen's Boss qualifies this as he blames her for all the incidents that happen at Starbucks and it ends with him firing Karen.
- Nonchalant Dodge: While Luigi is flinging knives and forks at Mario, Karen dodges a few stray projectiles without even looking up from her work or changing her expression.
- Noodle Incident:
- It's mentioned at the beginning of the episode that SMG3 stole free wifi from Starbucks.
- Zack making Cory fly like a helicopter has apparently happened before, going by Karen's reaction.
- Mario has apparently spent his and Luigi's life savings on spaghetti more than once.
- Retcon: Karen says in "Mario Does His Laundry" that she has 1000 children, but here, she only has three. She could have just been exaggerating, though.
- The Reveal: This episode reveals Karen's children and where she lives for the first time.
- Suddenly Speaking: Karen now has fully voiced lines for a whole video.
- The Unintelligible: Whereas Karen's other two kids are capable of speech via text-based dialoge, Cory communicates through sound effects and memes instead.
- You Are Grounded!: Karen does this to Zack when he misbehaves. This becomes a Chekhov's Skill when she gets Luigi to do it to a hyperactive Mario.
