Pyro Ball will thaw out the user if it is frozen, and then inflict damage on the target. Pyro Ball also has a 10% chance of burning the target. It has no effect on Pokémon with the Bulletproof Ability.
Cinderace repeatedly kicks a rock, igniting it into a flaming soccer ball. It then kicks the fire ball, launching it at the opponent. Cinderace can also kick the rock muliple times in sucession, making the Pyro Ball bigger each time it is struck, before launching it.