Yes he was great as Kato. Although sadly that show is often treated as the “it ran after the classic 60s Batman show”, which of cause it actually did(on the schedule).
Ed Wynn is probably my favourite supporting actor of all time… Which i guess is what “sidekick” stands for in this thread title. I loved his Disney films, and I just watched his appearence in “One For The Angels”, a classic episode of Rod Serling’s Twilight Zone. Then after that I watched the George Steven’s Anne Frank adaptation. He’s truly great in that film.
Also if we’re talking TV shows, Leonard Nimoy, Deforest Kelley and pretty much the rest of the cast of Star Trek apart from the lead(Bill Shatner) has to be here… and especially George Takei.
Burgess Meredith was a great supporting actor too, made a great career out of it. “Mickey” was one of the truly great supporting characters of 20th century film, and that actually came along quite near the end of his long sucessful career. “You’re gonna eat lightenin’, and you’re gonna **** thunder!”