Question:  Which characters were in a unique canonical cartoon from the "Looney Tunes" and "Merrie Melodies" series?

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Censored Eleven: The Censored Eleven is a group of "Looney Tunes" and "Merrie Melodies" cartoons originally produced and released by Warner Bros. that were withheld from syndication by United Artists (UA) in 1968.  UA owned the distribution rights to the Associated Artists Productions library at that time, and decided to pull these eleven cartoons from broadcast because the use of ethnic stereotypes in the cartoons, specifically black stereotypes, were deemed too offensive for contemporary audiences.  The ban has been continued by UA and the successive owners of the pre-August 1948 "Looney Tunes"/"Merrie Melodies".  These shorts have not been officially broadcast on television since 1968 and have only been exhibited once theatrically by Warner Bros. in Spring 2010 (see below for more details) since their withdrawal.  They have turned up, however, on low-cost VHS and DVD collections over the last thirty years.

Looney Tunes and Merrie Melodies filmography: This is a listing of the shorts, feature films, television programs, and television specials in Warner Bros.' "Looney Tunes" and "Merrie Melodies" series, extending from 1929 through the present.  Altogether, 1,003 animated theatrical shorts alone were released under the Looney Tunes and Merrie Melodies banners from the 1930s through the 1960s (1000 official, 1 pilot and 2 cuttowns) .  From the beginning to the present day, 1,042 shorts have been created.

Sylvester the Cat: Sylvester J. Pussycat Sr., usually called Sylvester, is a fictional character, a three-time Academy Award-winning anthropomorphic, 40, 50, or 60-Inch tall Tuxedo cat in the "Looney Tunes" and "Merrie Melodies" series of cartoons.  Most of his appearances have him often chasing Tweety Bird, Speedy Gonzales, or Hippety Hopper.  The name "Sylvester" is a play on "Felis silvestris", the scientific name for the wild cat species (domestic cats like Sylvester, though, are actually "Felis catus").  The character debuted in Friz Freleng's "Life With Feathers" (1945), but Freleng's 1947 cartoon "Tweetie Pie" was the first pairing of Tweety with Sylvester, and the Bob Clampett-directed "Kitty Kornered" (1946) was Sylvester's first pairing with Porky Pig.  Sylvester was not named until Chuck Jones gave him the name Sylvester, which was first used in Scaredy Cat.  Sylvester appeared in 103 cartoons in the golden age, appearing in the fourth most films out of all the Looney Tunes/Merrie Melodies characters, only behind Bugs Bunny, Porky Pig, and Daffy Duck respectively.  Three of his cartoons won Academy Awards, the most for any starring Looney Tunes character: they are "Tweetie Pie", "Speedy Gonzales", and "Birds Anonymous".

Soup or Sonic: Soup or Sonic is an animated cartoon distributed in the Merrie Melodies series, starring Wile E. Coyote and the Road Runner.  It was first aired on May 21, 1980 as a part of the television special "Bugs Bunny's Bustin' Out All Over" and was one of four new cartoons released.  While the opening card was used for the first time, the closing card for this cartoon was previously used during the 1959-1960 season.  This is the only canonical cartoon in which Wile E. Coyote catches the Roadrunner without him escaping afterward.

Looney Tunes Showcase: Volume 1: Looney Tunes Showcase: Volume 1 is a Blu-ray disc announced by Warner Home Video.  It was released on January 10, 2012.  It contains 25 Looney Tunes and Merrie Melodies and numerous supplements.  It is a separate release of Disc 1 of the .  This will be the series for Looney Tunes and Merrie Melodies cartoons in standard Blu-ray cases.  But due to low budgets in remastering the shorts, The Looney Tunes Showcase was discontinued.

Warner Bros. Animation: Warner Bros.  Animation (currently known alternatively as Warner Animation Group for theatrically released films) is the animation division of Warner Bros. The studio is closely associated with the "Looney Tunes" and "Merrie Melodies" characters, among others.  The studio is the successor to Warner Bros.  Cartoons (formerly Leon Schlesinger Productions), the studio which produced "Looney Tunes" and "Merrie Melodies" cartoon shorts from 1933 to 1963, and from 1967 to 1969.  Warner reestablished its animation division in 1980 to produce "Looney Tunes"–related works.

The Looney Looney Looney Bugs Bunny Movie: The Looney Looney Looney Bugs Bunny Movie (credited onscreen as Friz Freleng's Looney Looney Looney Bugs Bunny Movie) is a 1981 American animated package film with a compilation of classic "Looney Tunes"/"Merrie Melodies" Warner Bros. cartoon shorts and animated bridging sequences produced by Friz Freleng, hosted by Bugs Bunny.  The new footage was produced by Warner Bros.  Animation and the first "Looney Tunes"/"Merrie Melodies" film with a compilation of classic shorts to be produced by Warner Bros.  Animation.

Wile E. Coyote and the Road Runner: Wile E. Coyote (also known simply as "The Coyote") and the Road Runner are a duo of characters from the "Looney Tunes" and "Merrie Melodies" series of cartoons.  In the cartoons, the Coyote repeatedly attempts to catch and subsequently eat the Road Runner, a fast-running ground bird, but is never successful.  Instead of his species' animal instincts, the Coyote uses absurdly complex contraptions (sometimes in the manner of Rube Goldberg) and elaborate plans to pursue his prey, resulting in his devices comically backfiring with the Coyote often getting injured in slapstick fashion.  One running gag involves the Coyote trying in vain to shield himself with a little parasol against a great falling boulder that is about to crush him.

Daffy Duck: Daffy Duck is an animated cartoon character produced by Warner Bros. Styled as an anthropomorphic black duck, the character has appeared in cartoon series such as "Looney Tunes" and "Merrie Melodies", where he usually has been depicted as the best friend and occasional arch-rival of Bugs Bunny.  Daffy was one of the first of the new "screwball" characters that emerged in the late 1930s to replace traditional everyman characters who were more popular earlier in the decade, such as Mickey Mouse and Popeye.  Daffy starred in 130 shorts in the golden age, making him the third-most frequent character in the "Looney Tunes"/"Merrie Melodies" cartoons, behind Bugs Bunny's 180 appearances and Porky Pig's 162 appearances.

Jerry Beck: Jerry Beck (born February 9, 1955 in New York City) is an American animation historian, author, blogger, and video producer.  The author and/or editor of several books on classic American animation and classic characters, including "The 50 Greatest Cartoons" (1994), "The Animated Movie Guide" (2005), "Not Just Cartoons: Nicktoons!"  (2007), "The Flintstones: The Official Guide to the Cartoon Classic" (2011), "The Hanna-Barbera Treasury: Rare Art Mementos from Your Favorite Cartoon Classics" (2007), "The SpongeBob SquarePants Experience: A Deep Dive into the World of Bikini Bottom" (2013), "Pink Panther: The Ultimate Guide" (2005), and "Looney Tunes and Merrie Melodies: A Complete Illustrated Guide to the Warner Bros.  Cartoons" (with Will Friedwald, 1989) alongside "The 100 Greatest Looney Tunes Cartoons" (2010).  He is also an authority on the making of modern films, with his books detailing the art of "Mr. Peabody and Sherman", DreamWorks' "Madagascar", and "Bee Movie".  Beck is also an entertainment industry consultant for TV and home entertainment productions and releases related to classic cartoons and operates the blog "Cartoon Research."  He appears frequently as a documentary subject and audio commentator on releases of A&E's "Cartoons Go to War" as well as DVD collections of "Looney Tunes", "Popeye the Sailor", and "Woody Woodpecker" cartoons, on which he serves as consultant and curator.

Supporting paragraphs: Soup or Sonic Wile E. Coyote and the Road Runner
Answer: Wile E. Coyote and the Road Runner