"Leon is known far and wide for taking part in the Gym Challenge at the tender age of 10 years old—and even more so for claiming victory in the Champion Cup on his first attempt. Ever since that victory, he and his partner Charizard have remained unbeaten in both League and exhibition matches. He is called "the unbeatable Champion" and is a hero to many Trainers. He has but one weakness: a dismal sense of direction. But don't worry—wherever he ends up, he makes sure everyone has a champion time!"
Rare League Card
"Leon's dream, even when he was still the Champion, was to make Galarian Trainers the strongest Trainers in the world. In order to fulfill that dream, he has rebuilt Rose Tower into the Battle Tower, a facility dedicated to Pokémon battles. People say that he seems even more lively now than he was as Champion. Leon has also commented that another reason he likes the tower so much is because it's impossible to get lost inside. Leon's biggest problem now is apparently coming up with a new signature catchphrase to replace "Let's have a champion time!""
In the Battle Tower, Leon's team is randomly selected each time, but with Charizard guaranteed in the last slot (which he may still switch into at any time). He will Gigantamax his Charizard at the first opportunity.