Retroville is the city where The Adventures of Jimmy Neutron is set. Evidence points to it being located in Texas, with several references as it located there (ranches nearby, warm climate, as well as phone numbers being in the 212 area-code). Retroville is near a downtown area (as a possible reference to Sugar Land next to Houston).
Retroville didn't have a very important role in Nicktoons Unite!, the city itself didn't even appear but was only mentioned. However Jimmy's lab is the main base of the heroes. They go there after each world they visit. The Jimmy Neutron level mostly consisted out of Goddard's body and the last battle against the Universal Doomsday Machine part apparently was located in the undergrounds of Retroville.
Nicktoons: Attack of the ToybotsEdit
Retroville is the final level in Nicktoons: Attack of the Toybots, however it is not called Retroville but Calamitous' Lair. Mostly because you only visit Calamitous' Lair. You have to go through this level in your Mech Suits and battle Professor Calamitous in a battle suit at the end of the level.
Nicktoons: Globs of DoomEdit
Retroville is the fourth world the Nicktoons heroes, and villains visit. Upon arrival at Retroville they see that the Girl-Eating Plant has grown to en enormous size and had taken Cindy captive. It afterwards fled towards the Retroville Shopping Mall. You start in Retroland where you first have to cross a goo river by climbing the farris wheel. Later you have to walk over the rollercoaster track and eventually walk on the ground again. You then arrive at the Octapuke that you have to cross without getting hit by the electrified karts. At the end of the area you have to save Carl from the goo.
In the next area you arrive in the suburban area of Retroville. You have to walk over the streets and go through the gardens. When you cross the goo river you can save Sheen. You then continue to Jimmy's house and you can enter Jimmy's lab. Inside you'll have to ride with the hover car over a trail without getting hit by the electricity. You then take the rocket to the Candy Bar where you save Cindy.
In the last area you are in the Retroville Mall where you fight the Girl-Eating Plant. When they defeated the Girl-Eating Plant they return back to Volcano Island.
- In Globs of Doom you start in Retroland, at the ride from the movie.