Master Balls are Pokéballs in the real Pokémon games which have the ability to capture any Pokémon instantly. They are usually used on legendaries that are very hard to capture without using a Master Ball or a Shiny.
- In the Cerulean Gym 2 level, Ash attempts to capture Kyogre with a Master Ball. Mewthree then blocks the Master Ball and saves it for later by using Psychic.
- In the Vermillion Gym level, Brock succeeds to capture Mewtwo with a Master Ball. This Master Ball is later given to Sabrina to smuggle Mewtwo into Saffron City.
- Though Master Balls appear in PTD 1, you can't ever use one in-game.
|Potion • Super Potion • Max Potion • Evolution Stones|
|Pokeball • Master Ball|
|Old Rod • Super Rod|
|Chilian Berry • Oran Berry|
|Avatars • Badges • Rare Candy • Silph Scope|