“The problem comes when people stop asking,” he said in a telephone interview. “I’m incredibly grateful.”

The show has gained a new bump in attention after Netflix added the series to its lineup on April 1. And starting this year, Mr. Paulsen, 60, plans to reunite with the voices of Wakko (Jess Harnell) and Dot (Tress MacNeille) on tour to perform many of the show’s memorable songs, including Wakko’s list of American states and their capitals and a recollection of all of the U.S. presidents. This time, the voice actors will be backed by a full orchestra, as they were with the Colorado Symphony in 2014.

History buffs might be glad to hear that Mr. Paulsen will perform a new verse of “Yakko’s World,” which was written before the Soviet Union broke up, in 1991. The song has been frequently nitpicked for its omissions and shortcuts, and the new verse will add any nations formed in the past 25 years.

Randy Rogel, who wrote the song as part of his audition for the show and updated it for the tour, said in a telephone interview that it was “a little like putting a Rubik’s Cube together.” He not only had to find rhymes among the nations’ names, but he also had to keep them geographically close because Yakko would be pointing to them in the animation.

Mr. Rogel had won an Emmy for his writing on the darker “Batman: The Animated Series,” but the idea of a kooky comedy appealed to him. He said he got the idea for “Yakko’s World” when his son’s grandmother gave him a globe.