Crystal Gym Leaders & Elite Four
As usual, in Crystal you battle your way through 8 gyms, each specializing in a particular type. Following that you take on the Elite Four and the Champion. In fact all the teams and levels are the game as Gold/Silver.
The 8 gyms in Johto are different types to those in Kanto, and the Elite Four has some changes from generation 1.
Gym #1, Violet City
Gym #2, Azalea Town
Bugsy
Hive Badge
Bug type Pokémon
Gym #3, Goldenrod City
Gym #4, Ecruteak City
Morty
Fog Badge
Ghost type Pokémon
Gym #5, Cianwood City
Chuck
Storm Badge
Fighting type Pokémon
Gym #6, Olivine City
Jasmine
Mineral Badge
Steel type Pokémon
Gym #7, Mahogany Town
Pryce
Glacier Badge
Ice type Pokémon
Gym #8, Blackthorn City
Clair
Rising Badge
Dragon type Pokémon
Gym #9, Pewter City
Brock
Boulder Badge
Rock type Pokémon
Gym #10, Cerulean City
Misty
Cascade Badge
Water type Pokémon
Gym #11, Vermilion City
Lt. Surge
Thunder Badge
Electric type Pokémon
#125Electabuzz
Level 46
Electric
Gym #12, Celadon City
Erika
Rainbow Badge
Grass type Pokémon
#071Victreebel
Level 46
Grass · Poison
Gym #13, Fuchsia City
Janine
Soul Badge
Poison type Pokémon
Gym #14, Saffron City
Sabrina
Marsh Badge
Psychic type Pokémon
Gym #15, Cinnabar Island
Blaine
Volcano Badge
Fire type Pokémon
Gym #16, Viridian City
Blue
Earth Badge
Mixed types
Elite Four #1
Will
Psychic type Pokémon
Elite Four #2
Koga
Poison type Pokémon
#205Forretress
Level 43
Bug · Steel
Elite Four #3
Bruno
Fighting type Pokémon
#107Hitmonchan
Level 42
Fighting
Elite Four #4
Karen
Dark type Pokémon
Champion
Lance
Dragon type Pokémon
#142Aerodactyl
Level 46
Rock · Flying