Sylvester J. Pussycat Sr. is a fictional character, an anthropomorphic cat in the Looney Tunes and Merrie Melodies series of cartoons.

He appeared in 103 cartoons in the golden age of American animation, lagging only behind superstars Bugs Bunny, Porky Pig, and Daffy Duck.

[2] Three of his cartoons won Academy Awards, the most for any starring a Looney Tunes character: they are Tweetie Pie, Speedy Gonzales, and Birds Anonymous.

A common gag used for both Sylvester and Daffy is a tendency to go on a long rant, complaining about a subject and then ending it by saying "Sakes".

In the 1954 film Dr. Jerkyl's Hide, Sylvester pummels Spike (here called "Alfie") thanks to a potion that transforms him into a feline monster.

Both times after Spike's ordeal, Sylvester would have the courage and confidence to confront Chester, only to be beaten up and tossed away by the little dog.

Perhaps Sylvester's most developed role is in a series of Robert McKimson-directed shorts, in which the character is a hapless mouse-catching instructor to his dubious son, Sylvester Junior, with the "mouse" being a powerful baby kangaroo named Hippety Hopper which he constantly mistakes for a "giant mouse".

His alternately confident and bewildered episodes bring his son to shame, while Sylvester himself is reduced to nervous breakdowns.

Sylvester makes a cameo appearance in Who Framed Roger Rabbit, where he provides the punchline for a double-entendre joke regarding Judge Doom's (Christopher Lloyd) identity.

Sylvester appears as part of the Tune Squad team in Space Jam, voiced by Bill Farmer.

[5] Sylvester makes a cameo appearance in the Tom and Jerry Tales episode "Kitty Cat Blues" poster Sylvester makes a vocal cameo appearance in the 2020 Animaniacs revival segment "Suffragette City", with Jeff Bergman reprising his role.

This caused Daffy Duck and Elmer Fudd to reprimand him for not noticing the difference as Sylvester thought he aged good.

These ads usually consisted of Sylvester trying to get to his box of 9 Lives dry cat food while avoiding Hector the Bulldog.

In the issue, witches from the DC and Looney Tunes universes placed a wager where the existence of all birds and cats (as well as all bird- and cat-themed heroes and villains) depended on if Sylvester could eat Tweety.

[10] Mel Blanc had also voiced a human character named Sylvester on Judy Canova's radio show earlier in the 1940s.

In Mel Blanc's autobiography, That's Not All Folks!, Sylvester's voice is similar to Daffy Duck's, only not sped up in post-production, plus the even more exaggerated slobbery lisp.

In addition, director Bob Clampett, in a 1970 Funnyworld interview, agreed with Blanc's account concerning Schlesinger.