From 1989 to 1992, he was heavily involved with the first two seasons of the show in virtually every aspect of its production, including providing the voice of Ren Höek and other characters.

After moving to Los Angeles in 1978, he collaborated with Ralph Bakshi and worked for Filmation, Hanna-Barbera, and DIC Entertainment on various shows.

Nickelodeon fired Kricfalusi from Ren & Stimpy due to creative differences and his failure to meet production deadlines; the show continued for three additional seasons without his involvement.

Following this, he directed and produced animated television commercials and music videos for entertainers such as Björk and Tenacious D. In the late 1990s, he created the first cartoons made exclusively for the Internet: The Goddamn George Liquor Program and Weekend Pussy Hunt.

After their return they moved from Montreal to Ottawa in the middle of a school season, and Kricfalusi spent much of his time that year at home, watching Hanna-Barbera cartoons and drawing them.

Kricfalusi's interest in golden-age animation crystallized during his stay at Sheridan College, where he attended weekly screenings of old films and cartoons at Innis College held by film archivist Reg Hartt, among them the cartoons of Bob Clampett and Tex Avery, which left a deep impression on Kricfalusi.

[13][17] However, he did enjoy his work as a layout artist on the 1985 series of The Jetsons as he was able to train a team of Taiwanese animators to draw characters more emotive and wild, which at the time was considered radical.

The production of Mighty Mouse was very different from other cartoons at the time, gaining creative and artistic leeway thanks to the success of the irreverent Pee-wee's Playhouse on CBS a year before.

[27][28][29] In 1994, Kricfalusi pitched a revival series of Mighty Mouse to Paramount, which would have featured other Terrytoons characters such as Deputy Dawg, but they rejected the idea.

The long negotiations delayed the start of production to mid-July, causing much of the animation to be rushed in order to meet the September deadline.

[13] Kricfalusi formed Spümcø animation studio with partners Jim Smith, Bob Camp and Lynne Naylor.

While he was initially pleased with the added freedom afforded to him by Spike, he later expressed disappointment in the series due to its slow pacing and overuse of toilet humor.

[51] After leaving The Ren & Stimpy Show, Kricfalusi consulted, and other Spümcø animators worked for Donovan Cook's 2 Stupid Dogs, which was put into production by Hanna-Barbera president Fred Seibert.

Seibert approached Kricfalusi for advice and for recommendations for personnel to head the shorts, among them David Feiss, Tom Minton, Pat Ventura, and Eddie Fitzgerald.

[58] Jack Black of Tenacious D approached Kricfalusi to produce a music video for the song "Fuck Her Gently" from their debut album, released in 2001.

The first music video, for Close but No Cigar by "Weird Al" Yankovic, was released in September,[61] on the DVD side of the DualDisc album Straight Outta Lynwood, which features Kricfalusi's character Cigarettes the Cat.

[73] Kricfalusi appears in several bonus featurettes and provides audio commentaries for the Looney Tunes Golden Collection volumes 2, 3 and 5,[74][75][76] for cartoons directed by Bob Clampett and Chuck Jones.

He collaborated with streetwear brand Stüssy to create a short series of apparel based on his designs in 2012, which he promoted with a commercial featuring some of his characters.

[89] In 2012, Kricfalusi funded through Kickstarter a cartoon short entitled Cans Without Labels, starring the character George Liquor (with Michael Pataki reprising the role for the final time before his death in 2010, having recorded his lines beforehand),[8] with the initial delivery date of February 2013.

[93] The short received negative reviews for its animation, humor, sound design, storyline and repeatedly delayed production, as well as Kricfalusi's decision to release it following the sexual abuse allegations made against him the previous year.

[12][13][16] His main influence is Bob Clampett,[26][95] and he also names Chuck Jones, Frank Sinatra, Kirk Douglas,[96][97] Milt Gross, Tex Avery, Peter Lorre, The Three Stooges, Al Jolson, Bing Crosby, Dean Martin, Elvis Presley, Don Martin and Robert Ryan.

[99] In March 2018, former Spümcø employees Robyn Byrd and Katie Rice told BuzzFeed News that Kricfalusi sexually harassed and groomed them while they were underage.

Documents Rice and Byrd had saved from those years corroborate their stories, and several people who worked with Kricfalusi referred to his sexual harassment as an open secret in the animation industry.

[101] Due to the allegations, Kricfalusi will not be involved in Comedy Central's upcoming revival of The Ren & Stimpy Show, nor will he receive any financial compensation from it.