NovaBrunswick
Canada Connoisseur
It makes sense why it as so huge given that NYC was the basis for the design. What I liked about B2/W2's Hiun City was the added sewer system, park, and secret area that was only accessible during certain seasons.
Unova as a whole is based on the NYC metropolitan area, not New York state as many people think it is. Undella Town and Humilau City could be partly based on the Hamptons, which are seaside towns on Long Island that are popular vacation spots for New Yorkers. Nimbasa City is based on Coney Island, famous for its amusement park. The Pokémon Musical Theatre in Nimbasa could also be a nod to Broadway, which of course is world-famous for its theatres and musicals.