This is the back story for Beyblade Waking the cosmos
Their is an evil bey and a good one. The evil has the ability to steal the spirits of anyone who comes in contact with it. Those people's spirits are transformed into stars, and if they make it back to the world of the living they return as guardian beasts (Bit-Beasts). These beasts watch over the world and can guard those chosen to wield their power. And evil organization finds away to harness beasts before they return to the world of the living and build an army that could destroy eveything peacefull in the world. Our heroes must stop them before they lose everything they've ever known.