The Fairly OddParents

The Fairly OddParents! was a 10-season cartoon show series chronicling the consequences with giving a 10-year-old boy limited reality-bending powers. Timmy Turner learns a lot, maybe.

The show deals with some very strange continuity; The episode Timmy's Secret Wish revealed that Timmy wished nobody aged, a wish that lasted 50 years which nobody noticed.

Linked universes
This universe is famously linked with the universe of The Adventures of Jimmy Neutron, Boy Genius. A trilogy of crossover specials happened between the two. It's a bit tricky at first to figure out whether they are different universes or not, as Timmy's wish implies it's in the same universe. Perhaps they are the same universe, but are dimensionally layered on top of each other with Jimmy's dimension being 3D while Timmy's being 2D, judging by their first reactions upon entering their new worlds. Naturally, this is all theory talk and shouldn't be taken as pure fact.

Bunsen Is a Beast is linked with Fairly OddParents due to Bunsen Beast's house having a magical portal in his basement leading to Dimmsdale. What type of portal it is is unknown, as it could be interdimensional or simply teleports one to a location in the same universe. Amanda Killman herself calls it an interdimensional one, although Amanda's knowledge about identifying portals are pretty unknown or perhaps unreliable due to her low GPA. Both Amanda and Crocker could also buy something via the portal leading to The Front of Any Department Store Line-Up on Black Friday, suggesting a shared currency.

Links

 * Timmy Turner - The boy in pink. A good article to jump into other articles.
 * Timeline - An episode-by-episode timeline. Will count flashbacks if they're significant enough.