In Pokémon White and Black 2, Gym Leader Marlon can be found in the Humilau City Gym. This gym is located in the coastal town of Humilau City, which is accessible after defeating the Elite Four. Marlon specializes in Water-type Pokémon, and players must navigate a unique water-filled puzzle to reach him. Defeating him awards the player the Wave Badge.
Shaga in Pokemon Black, Iris in Pokemon White.
Cheren
Iris is found in both Black and White, but you can only face her as a a Gym Leader in Pokemon White version. In Black version, she is just a civilian who can teach your Pokemon the move Draco Meteor.
beat the gym leader
Pokemon Black: Last gym leader is male You catch the white legedary Different wild Pokemon Pokemon White: Last gym leader is a female You catch a black legendary Different wild pokemon May be more, but these are just the most obvious ones. Only very minor things, though!
After defeating gym leader Skyla.
no. its siren, the first gym leader.
Make sure your Pokemon are a few levels higher than the Gym Leader's Pokemon.
Iris is the girl ash travels with, she is also the last gym leader in pokemon white
on white the one to the very last is,and on black marshall(the one to the farthest right is. hope i helped.
Roxie in Virbank City, she specializes in Poison-type Pokemon.
in N's castle