Wakko Warner (voiced by Jess Harnell) is a cartoon character from the Warner Bros. animated television series Animaniacs. Alongside his siblings Yakko and Dot, he is one of the main characters of the show.
He is the same species as the other Warners and is a little taller than Dot. Wakko is arguably the most animalistic of the trio, as several segments have him behaving like a dog - walking on all fours, doing tricks for treats, etc. He is the only one of the three that wears a shirt and has a red hat, which he keeps on even when he does another costume. He also does not wear pants on most occasions, often joking about this aspect.
He's the middle child (in the song "Hello Nurse" he says he's "seven" to rhyme with "heaven," though according to Tom Ruegger, Wakko is actually 11), and the weirdest and most absurd of the bunch, hence his name. He speaks with a Scouse accent that Harnell explicitly modeled after Ringo Starr (initially Harnell created a John Lennon-esque voice for Wakko until he saw that the character was short, so he just raised the pitch). He often carries a "Gag Bag", from which he can produce objects as needed, and also uses a large mallet when situations call for it. More often than not, his tongue is sticking out of his mouth (it will hang out at any given moment). He generally supplies the more crude humor, which Yakko will often react to. He is the most physical of the three, and thus tends to lean toward physical humor (hence the first syllable in his name being "Wak").
Wakko is very flexible (there are a few episodes where the others make use of him for ladders and measuring tape). Wakko appears to have a voracious appetite in the show, and will eat almost anything, including gum found under a seat and even rocks for shock value or perhaps simply to see how they taste. He also has a fear of clowns. He's a big fan of Don Knotts from The Andy Griffith Show and, like his brother Yakko, he will also hit on any girl despite his young age. Like Yakko, he has a catchphrase: "Faboo!" meaning fabulous or great. Often his siblings use variations of "faboo", as in calling a male antagonist "Dadoo" to annoy them. According to the song "Hello Nurse" he is 7 years old; this was the only reference ever made to their age, and was not considered canonical by the writers.
His cap is his trademark; when the Warners wear costumes, Wakko will usually keep his cap on, which holds Elvis Presley hiding in the cap's hammerspace. Occasionally, he'll take it off, which makes him look very similar to Yakko, as seen in various episodes and the movie Wakko's Wish, of which he is the main protagonist. He follows in Yakko's footsteps by singing all the fifty US states and their capitals, in "Wakko's America". Wakko is usually the least talkative of the three unless he is the main character, and in some segments, he doesn't say anything at all. He also appears to be the most musical as well, being able to belch pieces of classical music (under the stage name "The Great Wakkorotti," with Maurice LaMarche providing the belches), play both the violin and the piano, and get behind a drum kit to deliver the occasional sting after a punchline. In the episode, "Chalkboard Bungle", Wakko can impersonate Ray Charles pretty well. His musical abilities, penchant for physical comedy, and usual quiet attitude seem to reference Harpo Marx.