Other mistake: Season 1, Episode 6: "Dirty Pranking Number 2".When the King intends to take Clara home, there are secret service agents jogging alongside the carriage. But in the first scene where it is seen, the agent on the frontal left of the carriage looks like he's hitching a ride, since he isn't hopping. In a later close-up of the King inside the carriage, an agent can be seen outside hopping up and down as he keeps jogging.
Other mistake: When Toot is in the attic and discovers The Legend of Xandir cheat book, the first code she uses is up, up, down, down, left, right, left, right, B, A, start. The only problem is the controller attached to the book is a Playstation controller. The Playstation controller doesn't have an A or B button but an X, Triangle, Circle, and Square button.