* CrossoverShip: Timmy/Cindy
* MemeticMutation: Timmy screaming "TALLYHOLE!" in ''The Jerkinators!''
* SurprisinglyImprovedSequel: The first special was considered alright with the only complaints that the character don't really interact with each other for very long. The second special however improves on this and had a much tighter story allowing characters from both universe to interact with each other.
* TheyWastedAPerfectlyGoodPlot: [[CrossOver Jimmy/Timmy Power Hour 3,]] it was originally going to be a GrandFinale for [[TheAdventuresOfJimmyNeutron both]] [[TheFairlyOddParents shows]]. Who didn't want to see a 3D Dimmsdale and a 2D Retroville, and see Crocker spazzing out in 3D?
* TooDumbToLive: Timmy in the first special.