Castelia City is the largest city within the Pokémon world. It has a number of stores, streets and piers in order to keep you occupied. In Castelia Street, you will find Black & WhiteFreak building where you can battle developers and gain the certificate for completion of your Pokédex. In the junction of the main area and Mode Street is the Battle Company building, where a decent amount of trainers can be battled. There are several piers which give access to Liberty Island, Unity Tower and the Royal Unova.

Name Changer
In Black & White, in the Northern Road or in Black 2 & White 2 in the western part of Pokémon Gym Street, you will find a man on the bottom floor of the lefthand building who will allow you to change the name of the Pokémon you have personally captured within your game.

Meloetta Event
If you bring the event Pokémon Meloetta to the Café within Slim Street, the musician playing in the café will tell you about Meloetta and how it once lost its voice. Here, it will teach you the move which allows Meloetta to change form.

Name	Type	Cat.	PP	Att.	Acc.	Effect
Relic Song			10	75	100	It makes the opponent listen to an ancient song and appeals to its heart. It may cause the opponent to sleep.

Gym (Black & White)
The Castelia City gym, located in the Pokémon Gym street is a maze involving switches and hidden trainers and requires you to walk through Honey in order to pass

Gym (Black 2 & White 2)
The Castelia City gym is located in the same area in Pokémon Black 2 & White 2 but features a new puzzle. Here, a multistorey maze has to be passed which utilises lines of silk, as created by an insect, which carries you tothe top floor where Burgh dwells