"Piglet's Mystery Pet" is the second segment of the thirty-sixth episode of My Friends Tigger & Pooh.
When Piglet finds what appears to be a fish stranded in a puddle of water, he adopts it as his very own pet and names it Squiggly. When Squiggly grows legs, Piglet becomes very concerned and calls the Super Sleuths for help. As the Super Sleuths investigate just what is happening to Squiggly, they and Piglet all speculate over just what kind of create he could be. They begin to realize that Squiggly has been changing since they day Piglet found him.