Airdate: September 21, 1991
To help the cave people with their labor, Mario introduces the wheel to Dome City. He goes as far as to introduce cars, which causes problems and gets the Mario Bros. in trouble. Meanwhile, King Koopa and Kooky von Koopa are inspired to invent a super weapon to attack Dome City with.
This episode has examples of
- Did Not Think This Through: Mario invents cars, but as Luigi points out, he should have invented driver's education first; the ignorant cave people cause numerous traffic jams and pileups.
- Gilligan Cut: "What are they gonna do, banish us to the lava pits?" *Cut* "Okay, so they banished us!
- Hamster-Wheel Power: The cars are powered by Goombas.
- Second Episode Introduction: King Koopa makes his debut here (not counting his appearance on a magazine cover in "Fire Sale").
- Today, X. Tomorrow, the World!: "Today, Dome City, tomorrow the world!"
