Rave Master(2001)

GROOVE ADVENTURE RAVE

Fifty years ago, an epic war raged between the forces of light and shadow, ending with an explosion that scattered the light's precious Rave Stones. Now, young Haru Glory, the new Rave Master, must uncover these legendary Rave Stones, the only force powerful enough to defeat the evil of the Shadow Stones. Armed with the magical Decaforce Sword, Haru joins forces with Elie, a spunky girl with a hidden past, and a lovable creature named Plue. Together they attempt to unlock the secret to their destiny. It is a journey of heroism and self-discovery. It is the adventure of a lifetime.

(Source: Tokyopop)