TV Show: Invader Zim Franchise: Invader Zim Invader Zim was a dark comedy science fiction Animated Series created by Jhonen Vasquez for Nickelodeon.This Nicktoon premiered alongside The Fairly OddParents on March 30, 2001 and is considered one of the bigger dark horses/oddballs within the channel's cartoon lineup. Directed by Jordan Reichek. The Nightmare Begins “The Nightmare Begins,” the pilot for the Invader ZIM animated series, first aired on March 30, 2001. But considering that Jhonen's previous work before this was an underground comic called Johnny the Homicidal … With Billy West, Andy Berman, Melissa Fahn, Rikki Simons.
Then a bunch of people freaked out on the Zim facebook pages going "is Zim back?

Billy West is an American voice actor. Billy West was born on April 16, 1952 in Detroit, Michigan, USA as William Richard West. Billy West, Richard Steven Horvitz are the voices of Invader Zim in Invader Zim. He is an actor, ... Did the voice of ZIM in the pilot episode of Invader ZIM (2001). It looks awful. So [with] Billy West, they record the whole pilot.

The part was then offered to Futurama voice actor, Billy West, who remained the voice of Zim for the unaired pilot. Invader Zim is an American animated television series created by Jhonen Vasquez.Twenty-one of the twenty-seven episodes originally aired on Nickelodeon from March 30, 2001 to December 10, 2002 while the remaining six were originally released on DVD on October 12, 2004. Then when they aired it on TV for the first time they aired the version where a few of the lines are Richard Horvitz playing him. I remember thinking it was amazing to finally see the pilot on DVD with Billy West as Zim. Jhonen wanted me to play Invader Zim, so they brought me, they loved me, but the executive producer at the time said, "Well, he’s already doing Daggett on The Angry Beavers, and we don’t want him on both shows, so we’re not going to hire Richard, we’re going to hire Billy West." However, Vasquez ultimately decided against West due to Futurama still being on the air and him not wanting the same voice actor to be the lead in two current sci-fi comedies. is this how the show will look? After discovering ZIM has a severe reaction to eating beans, Dib decides to stage a food fight in an attempt to expose ZIM as an alien once and for all. According to Billy… Invader ZIM (TV Series 2001–2006) cast and crew credits, including actors, actresses, directors, writers and more. He was the original voice of Zim in the Pilot episode of Invader Zim. (The original unaired pilot, which starred Billy West as ZIM, was eventually aired on the Nicktoons channel in 2011, as well as included in the first volume of the DVD release in 2004).