Battle Subway

 is a feature in Pokemon Black and White.

August 2010 CoroCoro Description
A subway where you can participate in seven battles at a time. If you win all seven battles you can earn battle points and exchange them for various gifts. There are three battle modes: single, double and multi battles. In multi battles you can team up with a friend wirelessly or with an in-game character. In all of the battle modes, each Pokemon you face is Level 50. There is one Trainer per train carriage.