My Friends Tigger & Pooh - Season 2 Episode 32 -

Darby's Lost Friend: It's the most monkeyfied mystery ever when Darby's stuffed monkey, Billy Boo, goes missing. Darby is sure that he couldn't have just walked off, but nobody is really sure how to find him. Everyone gives it their best go, but it begins to look like Darby might have to say goodbye to her friend.