Mr. Twiddle

Mr. Twiddle is the zoo keeper in the Wally Gator shorts. He was voiced by Don Messick.

Harvey Birdman
In "SPF" he's sued by Ding-a-Ling for using a porn website with Ding-a-Ling's name in it.

Wacky Races (2017) cameo
In the episode "The Wacky Always Races Twice" he played the role as one of the "Low Lives" that Penelope Pitstop had to avoid.