In The Challenger, Blue became the Kanto Champion after defeating the Elite Four. In the last episode, Calem was shown becoming the Champion of the Kalos region. Other characters who have become Champions of their regions also appear in the series. Known Champions in Pokémon Generations :
Also, Oak/Blue/Lance are all technically the champions of both Kanto and Johto, since they two regions share a league. (Most of) My plush collection!
Lance and Leon, the Champions of Kanto and Galar, respectively. In the Pokémon anime, there can only be one Pokémon Champion per region at a time, except for the Orange League.
In the adventure red series, Blue is shown to be the champion before Red defeats him and becomes the champion. I think Blue defeats Lance or The Dragon Master to become Kanto Champion.
Lance is a character appearing in Pokémon the Series, who is the Pokémon Champion in the Johto and Kanto region, and a member of the Elite Four in the Kanto region.
The known Champions are Ash Ketchum, Red, Green, Trace, Lance, Steven Stone, Wallace, Cynthia, Alder, Iris, Diantha, the Sun/Moon protagonists, Mustard and Leon. They all have the most powerful team of that particular region pre-Hall of Fame. Being a Champion may also be the starting point to becoming a Pokémon Master.
Ash Ketchum has finally become a Pokemon League Champion. In the 139th episode of the Pokemon Sun and Moon anime series, in the tropical Alola region, Ash finally took home the title of Pokemon League Champion, according to ComicBook.com. Winning the championship earned him the title of Pokemon Master.
It is revealed that Lance has a cousin named Clair, who is the Blackthorn City Gym Leader, and who also specializes in using Dragon-type Pokémon. In the two years between Red, Green and Blue and Gold and Silver, he became the Champion of the Johto region.
Red became the official Kanto Pokémon League Champion. Red is also a non-playable character in Gold, Silver, Crystal, HeartGold, SoulSilver, Black 2 and White 2, Sun, and Moon, Let's Go, Pikachu! and Let's Go, Eevee!.
RankingTrainerClassRankingIrisMaster7AshMaster8RaihanUltra9DrasnaUltra12↓20 more rows
It is said that Alder instructed the Elite Four to look after Unova as he traveled around the region. In Pokémon Black and White 2, former Opelucid City Gym Leader Iris has become the region's Champion....Floccesy Town.Types:BugSteel
Alder is the Champion of the Unova region in Black and White, succeeded by Iris in Black 2 and White 2.
VirgilVirgil wins the Unova League.
The Pokemon Adventures manga confirmed that Oak was a Champion in the past, and it's mentioned in the games that he was once a rival of Agatha, who is one of the strongest trainers in the region.
Tobias (Japanese: タクト Takuto) is a recurring character who appeared in the Pokémon anime. He is a Pokémon Trainer who competed in the Lily of the Valley Conference. He made his debut appearance in League Unleashed!.
Wallace is a character appearing in Generation III and VI. He is a Gym Leader in Ruby and Sapphire and Omega Ruby and Alpha Sapphire, and the Champion of the Hoenn region in Emerald.
In Sun & Moon, Kukui serves as the first final challenger before you become Champion, but, in the sequels, Ultra Sun & Ultra Moon, it's Hau who serves in this role.
Alder. Alder, unfortunately, is the type of Champion who looks cool and is nice, but when it comes to the battling part he leaves a lot to be desired. It makes sense that he wouldn't have a difficult or meta-based team considering he places a lot of importance on the relationships between humans and Pokemon.
Despite being Professor Oak's grandson, he shares none of the charm or charisma of his grandfather. When you face him after defeating the Elite Four, he comes prepared with a different team depending on which starter Pokemon you chose to begin your journey.
The Gen VI games are often overlooked and forgotten, but they're home to some of the most stylized and interesting characters, especially in the League. Diantha is one of these characters. Unfortunately, her battle lacks any real difficulty and takes away any true sense of accomplishment for trainers.
Also, it's hard not to be a fan of a guy with a Charizard he can Gigantamax in battle whenever he likes. It's said that Leon is undefeated in any title match, which makes it even more satisfying to defeat him and take that Championship title for yourself. Sorry, Leon.