Zero

Zero is the main villain in the Pokémon movie, Giratina and the Sky Warrior. Zero's plan was to gain Giratina's powers and try to protect (or, in Ash's perspective, destroy) the Distortion World. He has long, silver hair.

Trivia

 * His outfit slightly resembles Giratina because he is possibly obsessed with Giratina.
 * His hairstyle resembles Pokémon Hunter J's both being antagonist.