In the movie "Robots" by 20th Century Fox In the scene when Rodney first arrives in Robot City, Cid from Ice Age (also by 20th Century Fox) can be seen in the
Robots (2005) - IMDb
DVD - Robots - 20th Century Fox - USA
Art Of Robots Amazon.com The Leaf Men And The Brave Good Bugs Book Film Director,
Amazon.com: Robots, Horton Hears a Who, & Rio 3-Movie Collection [Blu-ray] by 20th Century Fox : Movies & TV