Thunder

Thunder was a Jigglypuff that had been modified by Team Rocket to be extremely powerful. She is described as having a permanent scowl on her face and a white scar running down her left eye. She was first introduced in Chapter 13 of ''Stun. ''

She was created alongside Leonidus, whom she considered to be one of her only friends. After escaping the Team Rocket hideout, she and her friend were separated under unknown circumstances.

She is responsible for creating a poison by mixing Vileplume and Arbok venom, which renders its victim completely paralyzed and can shut down access to psychic abilities.

Thunder was killed during the war against Tenebrae, when she took a powerful black Hyper Beam that was meant for Stun.