* CanonDiscontinuity
* CrossoverShip: Timmy/Cindy
* MemeticMutation: Timmy screaming "TALLYHOLE!" in ''The Jerkinators!''
* OlderThanTheyThink: These specials were actually ''not'' the first time Jimmy was shown crossing paths with Cosmo and Wanda. The real first time was in the ''Ride/JimmyNeutronsNicktoonBlast'' attraction, which came out in 2003.
* {{Sequelitis}}[=/=]ToughActToFollow: ''The Jerkinators!'' was supposed to be a GrandFinale for both shows, but lacked the luster of the first sequel.
* SurprisinglyImprovedSequel: The first special was considered alright with the only complaints that the characters 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 [[WesternAnimation/TheAdventuresOfJimmyNeutron both]] [[WesternAnimation/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.