Captain Phantom is the main antagonist of Pocket Monsters Advanced Generation the Movie - Pokémon Ranger and the Prince of the Sea: Manaphy.
He was the captain of a crew, including Guijeau, that traveled the world is search of valuable artifacts like the Sea Crown.

Captain Phantom is known for his maniacal laugh and pirate attire. He uses an arsenal of machines, including submarines and helicopters, more often than his Pokémon to overwhelm anyone who gets in his way. However, he is not above using his Pokémon when the situation calls for it.

(Source: Bulbapedia)

While touring Alamos Town-home of the Space-Time Tower- with the beautiful Alice, Ash and his friends discover that the town's special garden has been decimated! Baron Alberto, a dashing but arrogant fellow, immediately blames the destruction on Darkrai. 
As if it just overheard the accusation, Darkrai appears and confronts our heroes! 
Who is Darkrai? Is is a fiend... or a friend in disguise? And as a battle between Legendary Pokemon Dialga and Palkia rages directly abouve Alamos Town-and threatens to tear a hole in the space-time continuum- will Ash and his friends survive this showdown and learn Darkrai's true nature? 
(Source: DVD Cover [English Version])

Satoshi and his friends get lost in an unknown wasteland. They eventually come across a "Water Pokemon Show" performed by the star of the Mariner Troupe, Hiromi. Hiromi is a descendant of the troupe of Water People able to communicate with water pokemon, and she tells our heroes the legend that's been passed down by her people for generations. According to legend, a temple the Water People built called "The Water Temple Akuusha" rests somewhere in the ocean, and a treasure called "The Water Crown" is hidden there. It's said that no one has ever seen this treasure, but that changes when a Pokemon Ranger named Jack Walker (aka Jackie) appears to chase aftert it. 
Jackie is on a top secret mission that has him protecting the egg of the leader of the water pokemon, Manaphy. This pokemon, called the "Prince of the Sea," needs to be taken to the Water Temple Akuusha, so Satoshi-tachi and Hiromi decide to help him. Along the way, a pirate named Phantom attacks our heroes from his great submarine. Phantom plans to use the Water Crown's power to help him conquer the world, but he'll have to solve the mystery of Manaphy's egg first. When the Rocket-Dan get into the mix, Jackie uses his Capture Styler to borrow the power of a nearby pokemon to stand up to them. Satoshi and Pikachu enter the fray, but they still have to contend with the attacks of Phantom's powerful high tech mecha! Suddenly, the egg starts to shine with a vivid light, and Manpahy is born! 
What is the mystery of the legendary treasure? What mysterious powers does Manaphy have? Can Satoshi-tachi and Jackie complete their top secret mission? The journey to reach the Water Temple Akuusha has begun!

__Martial Arts:__ Judo 3-Dan, Karate 1-dan, Battodo 4-dan, Kotachi Goshindo 4-dan, Toudo master 7-dan, Iaido 1-dan, Yari, Shuriken  Hiro

Famous spanish voice actor.  http://www.eldoblaje.com/datos/FichaActorDoblaje.asp?id=3976