The Adventures of Elmo in Grouchland was a 1999 film which involved the use of puppets from a puppeteer who was also the voice of what character from "Star Wars"?
The Adventures of Elmo in Grouchland: The Adventures of Elmo in Grouchland is a 1999 American-German musical fantasy-comedy film directed by Gary Halvorson. Frank Oz:  He is also known for being the puppeteer and voice of Yoda in the "Star Wars" films.
Yoda