Back to Items 
Effect / Mechanics
Held: Allows Steelix to Mega Evolve into Mega Steelix.
Source: PokeAPI
In-game description
"One of a variety of mysterious Mega Stones. Have Steelix hold it, and this stone will enable it to Mega Evolve during battle."
Fling Power
80 Power
Power of the move "Fling" when using this item.