From Bulbapedia, the community-driven Pokémon encyclopedia.
Great Ball (Japanese: ) is a Trainer card. It is part of the EX FireRed & LeafGreen set.
This card was reprinted in the EX Delta Species and EX Power Keepers sets with the same artwork and effect, then again in the Stormfront set with new artwork by Kent Kanetsuna and the "(excluding Pokémon-ex)" clause removed from the effect, widening the range of Pokémon that can be searched for.
The Great Ball is a type of Poké Ball in the Pokémon games, which has an improved capture rate over the regular Poké Ball. The fact that this card doesn't require a coin flip to work, whereas the Poké Ball card did, might be a reference to this fact.
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