Loonatics Unleashed - Season 2 - Eps 11: The Music Villain
The Loonatics face off against Boötes Belinda, a villain and his band who uses rock music to terrorize Acmetropolis. When Zadavia is captured, he orders Tech to build a high-tech guitar for him. Now the Loonatics must save Zadavia and defeat this evil band. It turns out that the band are robots led by Rupes Oberon, a man who wrote a theme song for Zadavia on Freleng, but was shot down since there already was a theme. He uses the guitar to steal all of Zadavia's powers.
About Loonatics Unleashed

Title: Loonatics Unleashed
First Air Date: 2005-09-17
Last Air Date: 2007-05-05
Status: Ended
Rating: 8/10 (from 142 votes)
Language: EN
Seasons: 2
Total Episodes: 26
Network: The WB The CW
Genres: Animation, Action & Adventure, Comedy
Production Companies: Warner Bros. Animation
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.
Cast

Charlie Schlatter
Ace Bunny (voice)

Jessica DiCicco
Lexi Bunny (voice)

Jason Marsden
Danger Duck (voice)

Rob Paulsen
Rev Runner (voice)

Kevin Michael Richardson
Tech E. Coyote / Slam Tasmanian (voice)

Candi Milo
Zadavia (voice)