Black/White Gym Leaders & Elite Four
As usual, in Black & White you battle through eight gyms before taking on the Elite Four, with a few notable differences. We also note the significant trainer battles below.
The first gym features three leaders, each specialising in a different type of Grass, Fire or Water. You only fight one of them, depending on which Pokémon you chose as your starter. In the final gym, you fight one of two trainers depending on which version you have. However, their Pokémon are exactly the same.
When you reach the Elite Four, you can now fight them in any order you wish. The first time you only get to fight the Elite Four, then there is a diversion into some more of the game plot. Later on, you can rematch the Elite Four and take on the Champion.
Gym #1, Striaton City

Cilan
(Oshawott as starter)
Trio Badge
Grass type Pokémon

Chili
(Snivy as starter)
Trio Badge
Fire type Pokémon

Cress
(Tepig as starter)
Trio Badge
Water type Pokémon
Gym #2, Nacrene City
Gym #3, Castelia City

Burgh
Beetle Badge
Bug type Pokémon

Whirlipede
Level 21
Bug · Poison
Gym #4, Nimbasa City

Elesa
Bolt Badge
Electric type Pokémon
Gym #5, Driftveil City

Clay
Quake Badge
Ground type Pokémon
Gym #6, Mistralton City

Skyla
Jet Badge
Gym #7, Icirrus City

Brycen
Icicle Badge
Ice type Pokémon
Gym #8, Opelucid City

Drayden
(Pokemon Black)
Legend Badge
Dragon type Pokémon

Iris
(Pokemon White)
Legend Badge
Dragon type Pokémon
Elite Four #1

Shauntal - rematch
Ghost type Pokémon

Cofagrigus
Level 71
Ghost

Chandelure
Level 73
Ghost · Fire
Elite Four #2

Grimsley
Dark type Pokémon

Krookodile
Level 48
Ground · Dark

Grimsley - rematch
Dark type Pokémon

Krookodile
Level 71
Ground · Dark
Elite Four #3

Caitlin
Psychic type Pokémon

Gothitelle
Level 50
Psychic

Caitlin - rematch
Psychic type Pokémon

Gothitelle
Level 71
Psychic
Elite Four #4

Marshal
Fighting type Pokémon

Conkeldurr
Level 48
Fighting

Marshal - rematch
Fighting type Pokémon

Conkeldurr
Level 73
Fighting
Champion
Other trainers

Team Plasma N
N's Castle
Mixed types

Carracosta
Level 50
Water · Rock

Team Plasma N
N's Castle
Mixed types

Carracosta
Level 50
Water · Rock

Team Plasma Ghetsis
N's Castle
Mixed types

Cofagrigus
Level 52
Ghost

Bouffalant
Level 52
Normal

Seismitoad
Level 52
Water · Ground

Eelektross
Level 52
Electric