From Bulbapedia, the community-driven Pokémon encyclopedia.
The Johto League (Japanese: ジョウトリーグ Johto League) is the regional Pokémon League of the Johto region. It consists of a network of eight Gyms and the Elite Four. Less commonly, it is known as the Silver League, usually when referring to the anime.
Pokémon Trainers who earn eight Badges from sanctioned Johto League Gyms qualify to fight in Johto League competitions.
In the anime, the Silver Conference is the Johto League's annual championship competitions. It is held in Silver Town at the base of Mt. Silver.
The Indigo League and Johto League share a single group of Elite Four and Champion; eight Badges from either region will allow a Trainer to battle the Elite Four at Kanto's Indigo Plateau.
- Each of the Johto Gym Leaders except Bugsy has a type advantage against the next Gym Leader.
- Each of the Johto Elite Four also has a type advantage against the next Elite Four member, with the last member additionally having a type advantage against the first.
- Will's Psychic-type is strong against Koga's Poison-type.
- Koga's Poison-type is resistant to Bruno's Fighting-type.
- Bruno's Fighting-type is strong against Karen's Dark-type.
- Karen's Dark-type is strong against Will's Psychic-type.
- None of Johto's Gym Leaders specializes in the same type as a Kanto Gym Leader.