Boosts the power of a move by 30% when held, but each hit costs 10% of HP of the Pokémon's total HP.
The 10% loss of HP caused by Life Orb can be negated by the effects of the ability Sheer Force. Pokémon with this Ability, such as Darmanitan, still receive boosted power on their attacks, but do not lose HP.
 Locations Found
A Life Orb can be found on Route 227 near Stark Mountain in Diamond, Pearl and Platinum. In Heart Gold and Soul Silver, a Life Orb can be obtained in the top left section of the Ruins of Alph in Johto.
Life Orbs can be obtained at Gear Station in Black, White, Black 2 and White 2. Life Orbs can also be found at the Pokémon World Tournament in Black 2 and White 2. Life Orbs cost 48 Battle Points (BP) in Black and White, but only cost 24 BP in Black 2 and White 2.
Related Threadswill life orb boost explosion??? - last post by @ Feb 29, 2008
Is it wrong to run two pokemon with life orb? - last post by @ Nov 25, 2013
life orb and avalanche - last post by @ Jun 27, 2013
Life orb in the game? - last post by @ May 24, 2010
LeftOvers + Life Orb Help Pleasee? - last post by @ May 3, 2009