When Jorgen talks about the mess Cosmo and Wanda made at first he sounds what he sounded like in the Oh Yeah! Cartoons briefly ("You two have caused a major magical fluctuation...", "Do you know what that's doing to the fairies?", and "Poor little fairy") before changing to his Arnold Schwarzenegger-like voice ("...in the magic space continuum flux!", "Because of what you did, everyone now looks exactly the same and none of the fairies can find their kids!", "HAHAHA, I mean..."). It may have been since Norris was getting used to playing Jorgen's voice.
Mrs. Turner apparently can't cook well as her flamingo casserole collapses every time she makes one and takes it out of the oven.
When Jorgen grabs Cosmo and Wanda, the back of Wanda's shirt is colored pink (the same shade as her hair color) instead of yellow.
It is unreasonable for the fairies to just blow up because they can't find their kids but for the sake of the plot, the developers came up with this.
Wanda: Wow, Timmy won another game of Timmy Ball!
Cosmo: That's the first rule of Timmy Ball. Timmy wins!
Wanda: I thought there were no rules in Timmy Ball.
Cosmo: Well, that's the second rule!
Chester : Dude, didn't you see the lightning and hear the weird music?