Charizard is Leon's partner that he got as a Charmander and has raised ever since. It is an incredibly strong Pokémon that has been used in most of his World Coronation Series battles. Its moves regularly rotate but has been seen using Flamethrower, Fire Spin, Flare Blitz, Dragon Claw, Thunder Punch, Dig, Rock Tomb, Brick Break and Air Slash

Leon's Charizard is capable of Gigantamaxing.

Dragapult was used by Leon to help calm a Gigantamax Coalossal and to help calm a flock of Corviknight. Like Charizard, Leon can ride the Dragapult. It has used the moves Dragon Darts and Dragon Rush

Rillaboom was used by Leon during the first Masters Eight match against Alain. Facing off against Alain's Chesnaught, it immediately Gigantamaxed. It has Drumbeating and thus G-Max Drum Solo and Max Airstream at its disposal and eventually defeated the Rillaboom after receiving boosts, but fell to Alain's Charizard

Eternatus was given to Leon by Goh in order to maintain the Power Spots used for Dynamaxing throughout Galar and to protect the Galar Region in general

Mr. Rime was used by Leon during his Masters Tournament Final against Ash. It was sent out against Ash's Gengar and has moves including Powder Snow at its disposal which was used to freeze Gengar, but Gengar managed to pass the status back to Mr. Rime. It has moves such as Psychic Terrain at its disposal to power it up and Expanding Force to do even more damage, knocking gengar out

Cinderace was used by Leon during his Masters Tournament Final against Ash. It was the first Pokémon he sent out in battle against Ash's Pikachu. It has the Libero ability and used Scorching Sands to change into a Ground-type

Inteleon was used by Leon during his Masters Tournament Final against Ash. It was sent out against Ash's Gengar and has got moves including Liquidation and Dark Pulse at its disposal. It duplicated Ash's strategy against Cynthia's Spiritomb but eventually fell to Ash's Gengar in battle