Hornswiggle is a rhino expy of Terrytoons' Sidney the Elephant (A.K.A. Silly Sidney). Jerry Beck wanted to use the actual Sidney, but various issues forced him to retool it.
Those issues include Paramount not wanting to do anything with any of the Terrytoons characters after the failure of the pilot (that didn't even air until 2012... on RU-vid), Curbside
Yes Sir. This Hornswiggle2 Cartoon Should Have Been a Popular Nickelodeon American Cartoon Television Series All The Time, My RU-vid-Friends. Oh Yes. :-)