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Rolycoly-Coal is an item exclusive to the Pokémon universe, inspired by the Rock/Fire-type Pokémon Rolycoly and its evolutionary line. However, it appears there is no specific item named "Rolycoly-Coal" in the official Pokémon games databook or any known lore. Given the context, it is possible you might be referencing a fan-created or unofficial concept, or it could be a misunderstanding or misremembering of a different in-game item or mechanic.
That being said, if we were to imagine what Rolycoly-Coal could be, based on existing game mechanics and items:
Effects: 1. Boost to Fire and Rock-type Moves: Given the nature of Rolycoly, an item like Rolycoly-Coal could provide a boost to both Fire-type and Rock-type moves, increasing their power by 20%-30%. 2. Increased Speed in Sunlight: Reflecting Rolycol
No effect information available.
No game descriptions available.