PKMN.NET :: Dex :: Life Orb
ITEMS: Life Orb

In-game description: An item to be held by a Pokémon. It boosts the power of moves, but at the cost of some HP on each hit.
Price: 200

Technical explanation and other notes
Moves do 30% more damage, but user takes 10% of its maximum HP as damage with each hit.

Fling: 30 base power. Side effect: No additional effect