Nurse Joy's Latias was sent out to battle against Forest's Rhyperior to see if Forrest was worthy to be the Gym Leader of the Pewter City Gym. Brock and his family were all a bit shocked when it was revealed that a Legendary Pokémon was going to battle. Nurse Joy's Latias was able to withstand countless attacks from Forest's Rhyperior and ended up winning the battle.