Adored by the Network: The show had lots of advertising, a generous dose of reruns, even when only a handful of episodes of the show actually aired, and quite a few marathons, especially with the original Looney Tunes shorts, during its run. By mid-2013, however, it could only be seen at 6:30 in the morning on weekends.
As of 2023, Cartoon Network is airing reruns of this show again, every single day.
Cut Song: The Season Two soundtrack includes two "Merrie Melodies" songs not used on the show - "Sit Down" by Pete Puma and "Season of the Turtle" by Cecil.
Development Hell: This show tried to get off the ground for a few years, and when we finally had a premier date, it ended up getting pushed back about 3 times. The show's concept was overhauled at least once, with the episode "Casa De Calma" being the only remnant of that.
Early Draft Tie-In: Some merchandise used Tina and Petunia's early designs.
Marvin the Martian's speaking voice is Eric Bauza, but his singing voice is Damon Jones.
Foghorn Leghorn's speaking voice is Jeff Bergman, but his singing voice is also Damon Jones, which is weird because Jeff Bergman does his own singing for Bugs and Daffy.
Speedy Gonzales is voiced by Fred Armisen, but in "Queso Bandito," his singing voice is, once again, Damon Jones. Strangely enough, in Speedy's next two Merrie Melodies ("Pizzarriba" and "Table For One"), his singing voice is- guess who- Fred Armisen. Possibly because "Queso Bandito" portrays Speedy at a younger age. And to be fair, Jones does make Speedy sound higher pitched than usual.
Henery Hawk's singing voice is, last time now, Damon Jones. (but only on "Chickenhawk") His speaking voice ("Father Figures") and singing voice ("Christmas Rules") in later episodes are by Ben Falcone.
The Original Darrin: After Mel Blanc's death, Jeff Bergman inherited many of the Looney Tunes roles only to be replaced by Joe Alaskey, Greg Burson and Billy West. While some of Bergman's characters were recast with other actors, he at least returned to voicing Bugs, Daffy, Sylvester, Tweety, and Foghorn Leghorn.
Stan Freberg was going to reprise the role of Pete Puma, but was quickly replaced with John Kassir. The voice difference is highly noticeable compared to Freberg's Pete Puma voice. Rabbits Run has him voiced by Jess Harnell.
Tina Russo was voiced by Jennifer Esposito in Season 1, and by Annie Mumolo in Season 2.
Pepe Le Pew was voiced by René Auberjonois in Season 1 and Jeff Bergman in Season 2.
Lola's mother, Patricia, was voiced by Grey DeLisle in Season 1 and Wendi McLendon-Covey in Season 2.
For the 2015 movie Rabbits Run, Lola Bunny is voiced by Rachel Ramras instead of Kristen Wiig.
Originally, Grey DeLisle was billed to voice Petunia Pig before being replaced by Katy Mixon.
Voice actor Bob Bergen, during a guest spot on Stu's Show revealed that Joe Alaskey was originally cast as Bugs and Daffy, and recorded their lines for the "Casa De Calma" pilot. When the show started going through a Retool, Alaskey was asked by executives to re-audition for the parts, something that didn't make any sense to Alaskey (especially since he had already been voicing the characters for several years). This lead to a falling out between Alaskey and Warner Bros., with Jeff Bergman getting cast instead, and Alaskey rarely voiced any of the Looney Tunes characters again before his unfortunate passing in 2016.
Out of Order: "The Foghorn Leghorn Story" aired before "Working Duck", but is clearly set after its events. "Working Duck" shows Daffy's first meeting with Foghorn, and in "Story", Foghorn's secretary Carol directly mentions the time when Daffy bankrupted Enormocorp.
June Foray, the eldest of the actors and actresses, reprises her role as Granny, but she was unable to reprise her role as Witch Hazel, now Lezah.
With the exception of Daffy and Marvin, the voice actors for nearly every male Looney Tunes character who appeared in Duck Dodgers (which shares a lot of its creative team with this show) reprise their roles. Most notable are Bob Bergen as Porky, Maurice LaMarche as Yosemite Sam, Jim Cummings as Taz, Billy West as Elmer Fudd, and Rob Paulsen and Jess Harnell as the Goofy Gophers.
Short Run in Peru: The final episode premiered in the U.S. a year after the rest of Season 2, long after it had premiered in so many countries.
Similarly Named Works: Cartoon Network had an installment show that was named The Looney Tunes Show that ran from 2000 to 2004. Unlike this show, the first Looney Tunes Show was just a collection of classic Looney Tunes shorts from the Warner Bros. library (in a similar vein to The Bugs Bunny Show and its various alternative titles, Looney Tunes on Nickelodeon, That's Warner Bros., Merrie Melodies Starring Bugs Bunny and Friends, and others) and was a retool of The Bugs and Daffy Show that coincided with CN becoming the exclusive network to air Looney Tunes shorts. When the original Looney Tunes shorts returned in March to build up hype for The Looney Tunes Show, Cartoon Network actually returned the bumpers from the old Looney Tunes Show.
Originally, The Looney Tunes Show was supposed to be called Laff Riot and it was supposed to be a Three Shorts type of show in the style of Animaniacs and Tiny Toon Adventures, which were in turn closer to the style of the original shorts themselves. Matt Dannerwas in charge of development for Laff Riot before he was replaced by Spike Brandt and Tony Cervone.
The pitch also shows characters such as Toro the Bull from the short "Bully for Bugs" was planned to appear in the show and Porky was the owner of Sylvester instead of Granny like in the final show.
Casa De Calma was actually a completed pilot for Laff Riot, which explains that episode's noticeably different comedy style from that of the other The Looney Tunes Show episodes.
Joe Alaskey was going to reprise his roles as Bugs and Daffy but was replaced by Jeff Bergman.
Some unused storyboards and the pitch as well show Petunia was originally supposed to appear much earlier.
Other characters were planned for the scrapped season 3 such as Sniffles, Hubie and Bertie, Owl Jolson, Charlie Dog, Sam Sheepdog, Marc Anthony (possibly means Pussyfoot would have appeared), Hippety Hopper, and many others. They do appear in the show's title sequence.
The original Witch Hazel was actually intended to appear as a completely separate character from Witch Lezah, with the two being presented as sisters.
This show marked the only instance of June Foray (who turned 94 a few months after the show started) being older than the character she was voicing (Granny).
in this cartoon, Eric Bauza mentioned how he originally auditioned for Bugs Bunny before he was cast as Marvin the Martian.note 