Lorelei used Cloyster to battle a trainer's Alakazam, during her lecture. Afterwards, she used it to battle Pikachu. Pikachu used Thunderbolt, but Cloyster withdrew in its shell to negate any damage. Pikachu used Agility and after getting its attack repelled from Cloyster's Reflect, Pikachu hit Cloyster with a Thunder. Cloyster retaliated using Rage, defeating Pikachu with an Aurora Beam and a Take Down attack.