Blake Hall is the main villain of Pokémon Ranger: Shadows of Almia. He is the head of Altru Inc., a company that makes energy, and also the boss of Team Dim Sun. His main goal is to brainwash all Pokémon and use them as energy against their own free will.
Blake appears to be a decent-tall man with black long hair, tied into a ponytail with mustache. He appears to be wearing a gray-outfit, which consist of a purple shirt. He also appears to be having black glasses.
At the age of 16, he cast his father out of Altru Inc. and became the new boss. When he first meets the main character, he acts nicer than he really is and then leaves for most of the game, and then shows up again at the end of the game.
At the end of the game, after he almost killed Wheeler by pushing him off of a tower, he then tries to attack the main character with a Dusknoir. After that fails he tries to use Darkrai, however he is then trapped in a nightmare, but the main character saves him from Darkrai, and by the end of the game he turns himself in and is sent to jail.
It's found out that in the past, his name was changed from Wyatt Hall in front of the Shadow Crystal, which was intended to help him growing up, and after that he changed because of the darkness the Crystal was feeding him. His father's last words that he put in a book ask the heroes to save Blake. Post-game, an NPC states that despite his redemption, he has left for a faraway place to atone for his crimes.