A Pokémon Master is a Pokémon Trainer that has become the Champion and obtained all Pokémon other than the Legendary Pokémon. It is Ash Ketchum's goal to become a Pokémon Master and formerly Gary Oak's. Morrison also has this goal which has lead to quarraling between Ash and Morrison.

Misty also wants to become a Water Pokémon Master, which involves capturing every Water-type Pokémon. Giovanni has also been called a Pokémon Master due to him formerly owning Mewtwo.