Does anyone know the actor name who played Ernie's friend Elmore(yo-ho)in the episode
where Ernie flunks his drivers test (i think it is episode 361)? Thanks for the help.

The episode you refer to from Season 11 is titled "Ernie Drives" and the guest star was Butch Patrick, familiar to millions as Eddie Munster in "The Munsters". Also, he played a recurring character in the second California Season as Ernie's friend and next door neighbor, Gordon Dearing.