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Items › Standard balls

Master Ball

Master Ball is an item in the “Standard balls” category (Poké Balls).

In-game descriptions

Ruby / Sapphire · EmeraldThe best BALL that catches a POKéMON without fail.
FireRed / LeafGreenThe best BALL with the ultimate performance. It will catch any wild POKéMON without fail.
Diamond / Pearl · Platinum · HeartGold / SoulSilver · Black / White · Black 2 / White 2The best Ball with the ultimate level of performance. It will catch any wild Pokémon without fail.
X / Y · Sun / Moon · Ultra Sun / Ultra Moon · Let’s Go, Pikachu! / Let’s Go, Eevee! · Sword / ShieldThe best Poké Ball with the ultimate level of performance. With it, you will catch any wild Pokémon without fail.

Where to find it

PlaceGamesHowTile
Evil Team Hideout — B1FRuSaon the ground15, 9
Evil Team Hideout — B1FEon the ground15, 9
Magma Hideout — B1FRuSaon the ground26, 10

Sources : PokeAPI (items, item_flavor_text, machines) · atlas · pokeemerald species_info.h