Gem of the eight

In this world, stones are very rare. One of the rarest is called the Rainbow Gem. The Rainbow Gem can used to evolve any Pokemon to what you want and it can give you a legendary power! Then one day, Team black tried to steal the Rainbow Gem. They dropped it (of Course!). Then it flew to 8 parts of the Kalos region. Who will find the pieces? Will it be the right hands? find out in the Gem of the eight!