Conversation so far:
What was the penguin's name that Don Adams did the voice over for?
Adams was the voice of a penguin named Tennessee Tuxedo.
What were the names of some of the characters that Don Adams provided voice over for?
His most notable voiceover work was that of the title character in Inspector Gadget. He also voiced the character of Principal Hickey in the Disney cartoon Pepper Ann.
What was the last voice over that Don Adams did?
His last roles were the character of Principal Hickey in the Disney cartoon Pepper Ann, and the voice of Brain the Dog in the 1999 film version of Inspector Gadget.

Question: Did he ever play himself in any cartoon?
Self-contained rewrite: Did Don Adams ever play himself in any cartoon?