Vermillion City is the third city a trainer will encounter. The city's Gym Leader is Lt. Surge, a professional -type Pokémon trainer.
Mr. String's Nicknaming Service
You can nickname your Pokémon by talking to an NPC in the PokéCenter. Even if you are not the OT, you can still rename the Pokémon in the newest update.
Vermillion Gym is an-type Gym with Lt. Surge as its Gym Leader. Before you battle him, you must defeat another trainer named Youngster Rex.