"Ow" cried Piglet "let me out! I'm Piglet!"... "W w what medicine?" said Piglet ... "Christopher Robin, Christopher Robin!" cried Piglet "Tell Kanga who I am! She keeps saying I'm Roo, I'm not Roo, am I?"

Piglet is Pooh's friend. He can fit into Kanga pocket and he DOES NOT like taking baths. When Roo was captured, Piglet took his place in Kanga's Pocket and had a very unpleasant experience after he was forced to take a bath and wasn't recognized by his own friends. Since then Piglet doesn't like taking baths.
When he was surrounded by water Pooh and Christopher Robin came to his rescue on the boat "The Brain of Pooh".