Robbie Rotten decides he needs to use more than one sugar apple to beat Sportacus, but when he can't put 2 and 2 together, Stephanie helps him out. She explains that she learned how to add in school, which is for everybody, not just kids. With the big math final coming up, Stephanie needs to study hard.
Robbie initially scoffs, but when he learns he needs to graduate to be recognized as the world's top villain in a magazine, he enrolls himself as a student—and switches papers with Stephanie so she'll be held back. Everyone must find evidence of the switch to clear Stephanie's name!
This episode contains examples of:
- Adults Are Useless: Zigzagged—while Sportacus is useful as usual, Bessie and the Mayor are easily taken in by Robbie's plan to swap his own blank paper with Stephanie's, despite the latter being an A student and someone clearly scribbling out the original name on her paper. It falls to the kids, and particularly Trixie, to get to the bottom of things.
- An Aesop: The classic "Cheaters never prosper."
- Apathetic Teacher: A variant. Bessie Busybody, who's the children's teacher, is more distracted and flighty than truly uncaring. When Robbie-as-Biff attends school, he throws a paper airplane at Bessie, who completely ignores it, even though it lands in her hair; when he flings a coin at the school bell to signal the end of class, Bessie cheerfully agrees that it must be time to change topics—despite the fact that she's spent less than a minute on the lesson; and during the students' lunchtime, she's too busy chatting on the phone to notice Robbie bothering the other kids.
- Chekhov's Gun: After Robbie throws away Ziggy's banana, we see a shot of the peel on the ground outside. When he's running away from the kids after his cheating is exposed, he promptly slips on the banana peel and ends up needing Sportacus to save him.
- Continuity Nod: A few to "School Scam":
- Mayor Meanswell is the principal, just as he was in the original episode.
- Sportacus attends the class and allows the kids to ask him questions as a guest speaker, which is identical to what he did in "School Scam."
- Crossing over with Character Development—in "School Scam," Ziggy brought nothing but candy to school for energy. Here, he's shown eating sportscandy for lunch instead, proving that he took Sportacus's lessons about healthy eating to heart.
- Heroic BSoD: When Stephanie gets a failing grade on her math test, she rushes out of the schoolhouse in tears. It takes Sportacus comforting her, and the other kids helping prove that she's been framed, to cheer her up.
- I Ate WHAT?!: Crossing over with Good Is Bad And Bad Is Good. Robbie is disgusted to discover that the banana he just ate is a piece of sportscandy.
- Imposter Forgot One Detail: When Robbie, disguised as Biff, writes Stephanie's name on top of his own test answer sheet, he doesn't put a heart over the "i", which is enough for Trixie to figure out that something suspicious is going on.
- Noodle Incident: Somehow a chihuahua has been listed as the Number One Villain in the World. What makes it even funnier is that in order to be considered a true villain, they must graduate school—so the chihuahua did, too.
- Only Sane Man: Trixie is the first person to realize that something is off about "Biff" by noticing that his obviously-phony glasses are being used as a sleep mask. Later, when Stephanie has apparently failed the class, Trixie is the one who leads the kids in looking for evidence to prove that someone swapped Stephanie's test with their own, and she figures out a way to expose the cheating by asking Stephanie the same questions from the exam to prove that she did know all the answers.
- O.O.C. Is Serious Business: When Bessie hands back Stephanie's failing test grade, she realizes that something must be terribly wrong, as Stephanie is usually the smartest student in school. The other kids agree and realize something fishy is going on.
- Paper-Thin Disguise: Robbie's garb as "Biff Rottenstern" is even worse than his usual looks—it's literally just a baseball cap, jacket, argyle socks, and shorter pants, none of do anything to disguise his facial features.
- Shouldn't We Be in School Right Now?: As with "School Scam," the episode acts as if the kids have been in school for a long time, as it's the last day of classes and they've apparently been studying offscreen.
- Shout-Out: Robbie's "Biff" character borrows a lot from Back to the Future—not only does he have the same name as the villain of the movie, he also briefly imitates Michael J. Fox's imitation of Chuck Berry's famous duck-walk during a guitar solo, referencing the performance of "Johnny B. Goode" that features in Future's climax.
- Spotting the Thread: Trixie realizes that someone swapped their paper with Stephanie's when she notices that the cheat, when writing Stephanie's name, didn't dot the "i" with a heart, something the real Stephanie always does.
- Suddenly Always Knew That: Apparently, Stephanie is, and always has been, excellent at all forms of mathematics, including basic algebra—a talent which she's never displayed before.
- Why Do You Keep Changing Jobs?: Bessie Busybody is the children's schoolteacher now. It's implied that Mayor Meanswell is the principal, too, which carries over from "School Scam."
- Too Dumb to Live: Robbie isn't just incapable of literally putting two and two together—he doesn't know how to eat a banana.
