People not believing Turkey is actually a country.
Doug Dimmadome banning dogs from places (specifically Timmy and Sparky).
Human Sparky acting like a dog.
People being reminded of someone they know.
Cosmo's Turtle biting people on the butt.
Timmy/Sparky chasing squirrels.
Doug Dimmadome hanging out with an ostrich and letting him enter everywhere.
Doug Dimmadome hates tables.
In the scene where Timmy is writing, the girl next to him has a giant paper as well, but in the next scene, only Timmy has a paper in front of him, which is kind of bigger.
Also, when Timmy looks out the window the same girl next to him is still the same, but in the next scene where everyone holds Sparky, the girl has a totally different design.
Cosmo, Wanda, and Poof go up to Sparky in fairy form at the derby. According to Da Rules, fairies can't reveal themselves.
The true-love block stopped Timmy from turning Sparky back into a human because he loved being human. However, when Timmy finds Sparky, he claims that he never liked being a human. Therefore the true-love block shouldn't have stopped him.
Couldn't Timmy have wished that there was ANOTHER dog to fill the space instead of himself?
Couldn't Timmy have wished that Doug Dimmadome allowed Sparky to come to the derby and dog park?