There's actually a book series (for kids) about it! I loved them! PotC was my first big fandom, just because I thought Captain Jack was such an amazing character! There's a ton of lit published by Disney about all the characters' back stories.
Here are 29 fun facts you may not have known about Toy Story. In the scene in toy story 3 when the toys fall out if the box and meet the sunnyside toys there is a mr ray toy from finding Nemo sitting on one of the shelves