Why is jules the hedgehog a robot

Jules is a robot because he almost died from saving Sonic's life. During his time of service to the Royal Army in the Great War, Jules was fatally injured, forcing him to become the first Mobian in history to go through the process of roboticization to save his life. Despite arriving in time for medical treatment, Jules wounds proved fatal. With no other alternative to save his brother's life, Charles decided there was only one hope to save Jules: the Roboticizer. that's why.