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Rolycoly resembles a floating coal with a single orange eye attached to its head. Four rocky bulges stick out of Rolycoly's sides. A larger circular piece of rock attached to Rolycoly resembles a wheel.
Rolycoly uses its eye to illuminate the dark caverns it inhabits. The large piece of coal attached to Rolycoly's underside allows for better maneuverability over the roughest of terrains.
In times past, the entire population of families living in the Galar region would use pieces of coal dropped by Rolycoly as a heat source for cooking food and keeping houses warm. Even today, people would bring along Rolycoly during outdoor activities.
| Bold indicates this Pokémon receives STAB from this move.|
Italic indicates an evolved or alternate form of this Pokémon receives STAB from this move.
- Rolycoly shares its species name with Torkoal. They are both known as the Coal Pokémon.
- Rolycoly is similar to both Geodude and Roggenrola as all three are Rock-type Pokemon based on living rock. However, unlike Geodude, Rolycoly is a pure Rock-type just like Roggenrola.
- In addition, Rolycoly is the only one that has yet to evolve.
Rolycoly may be based on a coal-ore or cooled magma rocks. It also has some characteristics of a one-wheeled vehicle, such as the circular coal ore attached to Rolycoly's underside.
Rolycoly comes from roly-poly and coal.