Animaniacs

'Animaniacs' is the collaborative effort of both Warner Bros Animation and Steven Spielberg and was the company's 2nd animated series since the release of the Looney Tunes franchise. The series followed the exploits of the Warner siblings Yakko, Wakko and Dot who are deemed 'too zany' for studio use. As a result, the 3 were looked in the studios water tower until they escaped in the early 1990's only to run wild around the lot, being pursued by the studio CEO and several security guards. The show was "even nuttier than its predecessor 'Tiny Toon Adventures'" [http://www.tv.com/shows/animaniacs/], as they themselves say in the opening theme, "We're Animaniacs, And we're zany to the max"

Animaniacs Title Sequence

The show often featured random short skits from other regular characters in a sort of animated anthology (Animated series featuring a collection of short subjects. Often uses recycled material that was originally intended for an adult, movie-going audience and can result in controversy and censorship) - the best example of this was the shows later spin-off 'Pinky and the Brain' [http://tvtropes.org/pmwiki/pmwiki.php/Main/AnimatedAnthology].

Another thing the show did very well was insert the characters into popular Saturday morning cartoons throughout the 60's-80's; parodies of shows such as 'Yogi bear' and 'Scooby-Doo' [http://tvtropes.org/pmwiki/pmwiki.php/Main/AnimatedAnthology] (See Art Shift [http://tvtropes.org/pmwiki/pmwiki.php/Main/ArtShift]). They also parodied key scenes from their rivals Disney including the opening scene of 'The Lion King'.

Sources:
http://www.answers.com/topic/animaniacs
http://www.imdb.com/title/tt0105941/
http://www.tv.com/shows/animaniacs/
http://tvtropes.org/pmwiki/pmwiki.php/Main/AnimatedAnthology
http://tvtropes.org/pmwiki/pmwiki.php/Main/ArtShift