They have provided some great songs like the Animaniacs theme song, 'What Are We?', 'The Senses Song', the titular song from the 'Piano Rag' segment, etc.A majority of the show's humor comes from them.

Animaniacs Splat Ball Yakko appears in this spin-off game. Rob Paulsen reprises his role. Video Games Animaniacs Game Pack Yakko appears in this spin-off game. Rob Paulsen reprises his role. He is voiced by Rob Paulsen Yakko's World: An Animaniacs Singalong Yakko appears in this musical video. He is voiced by Rob Paulsen Wakko's Wish Yakko appears alongside his siblings in this direct-to-video film. Film I'm Mad Yakko appears alongside his siblings in this theatre short. Pinky and the Brain Yakko makes a cameo appearance in the episode 'Star Warners'. He is voiced by Rob Paulsen Freakazoid Yakko makes cameo appearances in the episodes 'Five Day Forecast/Dance of Doom/Hand Man' and 'Next Time, Phone Ahead/Nerdator'. He made his first appearance in he first episode in the series, 'De-Zanitized / The Monkey Song / Nighty-Night Toon'. Other Media Animation Animaniacs Yakko was originally created for the Animaniacs television program. As a cartoon character, he is not bound by normal physical laws. He has demonstrated proficiency in Japanese. Powers and Abilities Yakko is of above average intelligence he is quick-witted and glib, and possesses vast amounts of knowledge on a variety of subjects. Major Story Arcs AnimaniacsYakko and his siblings wreak havoc and engage in wacky antics, often directed against an authority figure who has wronged them in some way. He made his first appearance in comics in Animaniacs: A Christmas Special. CreationYakko was originally created by Tom Ruegger for the Animaniacs television show. They remained there more or less continuously for several decades before permanently escaping in September of 1993 to cause chaos anew. He and his siblings ran wild on the studio lot for some time before being captured and locked away in the Warner Bros. was severed due to their antics and their odd work. Eventually their contract with Warner Bros.

He, Wakko and Dot quickly overshadowed this other character in popularity, but their work grew increasingly surreal and bizarre. OriginYakko was created in 1929 alongside his siblings as supporting cast for a preexisting character.

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