Battle for the Underground! (Japanese: 激走!バトルサブウェイ!!(後編)Flat-out Run! Battle Subway!! (Part 2)) is the 48th episode of the Best Wishes series, and the 705th episode of the Pokémon anime. It first aired in Japan on September 15, 2011 as part of a one-hour special, in the UK on December 28, 2011 and is scheduled to air in the United States on January 7, 2012.
Spoiler warning: this article may contain major plot or ending details.
A hero and villain-themed episode featuring an Accelgor-themed, motorcycle-riding hero and his Accelgor against an ice-themed set of villains. The two henchmen, who dress like their Pokémon, each use Vanillite, while the Cryogonal-masked leader uses Vanillish. (BW057)