This is the story of Ditto's challenge, as he is not good at "transforming". He tries his best to transform into other Pokemon, but his face remains as Ditto's. Now this merchandise shows how he manages to transform into another Pokemon, but his face remains as Ditto's. You might be
able to understand how Ditto feels when he is not good at "transforming"! A stuffed animal that "transforms" into Charmander, but only his face remains as Ditto's.