One piece begins with the execution of the King of Pirates, Gol. D. Roger. Just before his death his announces that his treasure will be available to anyone who finds it, beginning the Great Pirate Era. This Pop Vinyl features Tony Tony Chopper, he is a doctor and a blue-nosed reindeer. The Human-Human Fruit provided him with the ability to transform into a human or human-reindeer hybrid. He developed a drug called Rumble Ball which enables him to perform even more transformations.