The Sinnoh League is the regional Pokémon League of the Sinnoh region. The Sinnoh League is composed of eight Sinnoh Gym Leaders and four Sinnoh Elite Four members, along with the Champion. Pokémon Trainers who earn eight Gym Badges by defeating the Gym Leaders of the Sinnoh League qualify to challenge the Elite Four located in the Pokémon League building.
In the anime, it is known as the Lily of the Valley Conference.
The traditional Pokémon League Championship follows. Trainers must first collect the eight official Gym Badges to be qualified to battle the Elite Four. Gym Leaders are located in different cities and towns, each with their own different type.
|Generation IV||Region: Sinnoh|
| Gym Leader
| Oreburgh City
| Eterna City
| Veilstone City
マキシマム仮面 Maximum Mask
| Pastoria City
| Hearthome City
| Canalave City
| Snowpoint City
| Sunyshore City
Elite Four and Champion
Once finished, Trainers must face the Elite Four, as usual, then defeat the Champion at the end of the League. Those who challenge the Elite Four must have achieved all eight Badges from that region and face all four and the current Champion consecutively without losing to any of them.
In Diamond and Pearl, the Elite Four's Pokémon will be at higher levels if Barry is defeated 20 times or more. In Platinum, their Pokémon will level up when the National Pokédex has been obtained and Charon has been arrested at Stark Mountain.
The Elite Four reside in the Pokémon League building.
- The Sinnoh League is the only league in the main series games to have only one known Champion.
|The Pokémon League|
Trainer • Battle • Gym Leaders
Gyms • Badges • Hall of Fame
Elite Four • Orange League
Pokémon World Tournament
Pokémon League Conferences
Indigo • Silver • Ever Grande
Lily of the Valley • Vertress
| Pokémon League locations|
Indigo Plateau • Pummelo Stadium* • Mt. Silver*
Ever Grande • Pokémon League*/Lily of the Valley*
Pokémon League*/Vertress* • Pokémon League
Regional Pokémon Leagues
Indigo • Orange* • Johto • Hoenn
Sinnoh • Unova • Kalos
Areas of jurisdiction
Pokémon League Reception Gate • Cerulean Cave