White tests out a Pokémon battleground prototype: the Battle Subway.

Meanwhile, Black is happily reunited with an old friend… under unhappy circumstances.

Then Gym Leader Clay reveals a dangerous secret.

Now Black must prove himself to the other Unova Gym Leaders so he can join their team to fight a common enemy – an evil organization that might jeopardize the Pokémon League Championship itself!

Will Black earn the trust of the Unova Gym Leaders in time… by ringing a bell?!