Synopsis

Ace Bunny, Tech E. Coyote, Danger Duck, and friends are transformed into superheroes when a meteor hits the planet 700 years in the future. Now they spend their time making jokes while blasting monsters and asteroids with “neutron cannons” and whatever other weapons they have at hand.

thumb|right|Original character designs under the initial working title of Loonatics originally named from left: Slick, Spaz, Buzz, Duck, Lexi, and Roadster.

Loonatics Unleashed began as a pitch by Christian and Yvon Tremblay, originally titled The Loonatics using reinterpretations of classic Looney Tunes characters.

The Loonatics were first unveiled to the public in February 2005 with a live-action/animated promotional short that featured the characters with early designs and names such as Zadavia being originally named Maxima.

A petition demanding a change to the Loonatics designs garnered 85,000 signatures.

Ace's original planned name of Buzz Bunny was likely changed due to a similarly named character created by Metin Seven as well sharing the name with a sex toy.

In September 2006, The CW presented its lineup for the 2006–07 Saturday Morning schedule with Loonatics Unleashed returning for a second season, with the press release describing the show as a "breakout hit".