Timmy is curious about what the inside of the castle in Cosmo and Wanda's fishbowl looks like, but his Godparents won't let him in, so he uses his Shrink Suit to infiltrate the castle while they're sleeping. While inside, he encounters some of Cosmo and Wanda's famous (and most infamous) Godkids.
- Alien Geometries: During the scene where Timmy and Cosmo chase Maryann, Timmy dives into a door on the floor that clearly has stairs going down, and then immediately falls out of another door on the ceiling in the same room.
- Been There, Shaped History: Maryann, one of Cosmo and Wanda’s former godkids, wished that the Archduke of Austria was killed, starting off World War I.
- Call-Back: Timmy uses the Shrink Suit from "Tiny Timmy" again, this time to enter the castle.
- Continuity Nod:
- A picture of Denzel Crocker can be seen within the Hall of Fame.
- Phillip the Nickel from "Spaced Out" appears in this episode. Cosmo is seen using her as a steering wheel as he has a dream about driving a race car (since he sleeps in a race car bed), and later wakes up Wanda to tell her "Phillip thinks she heard a noise."
- Face of an Angel, Mind of a Demon: Maryann looks like a sweet and innocent girl on the outside, but she's actually one of the most vile characters on the show; she was the one responsible for abusing Cosmo and Wanda's magic to assassinate Archduke Ferdinand, which was what started World War 1 in the first place, which means she's also responsible for World War II by extension.
- French Jerk: Pierre, of Cosmo and Wanda’s former godkids; he wished that the French people were rude to all Americans.
- Scooby-Dooby Doors: There is a sequence of this as Timmy chases Maryann throughout the castle, with the addition of Cosmo looking around after hearing Timmy's voice.
- Shout-Out: While Timmy is in the arcade, the the power-up sound from Super Mario World can be heard.
- Voice Changeling: Timmy is able to imitate Wanda's voice in this episode, which allows him to get past the voice-activated locks.
