Beanie the Brain-Dead Bison (also called Beanie the Cerebrally Challenged Bison) is one of Slappy Squirrel's foes from her cartoons. As per his name, he is a few ants short of a picnic and a slow wit.
He was voiced by the late Avery Schreiber.
Episode 3: Slappy Goes Walnuts (mentioned, imitated by Slappy)
Episode 16: Chalkboard Bungle/Hurray for Slappy/The Great Wakkorotti:
The Master & His Music
Episode 62: Scare Happy Slappy/Witch One/MacBeth
Episode 72: Deduces Wild/Rest in Pieces/U.N. Me
Episode 99: Birds on a Wire/The Scoring Session/The Animaniacs Suite