Mounblutain is a very large man, much taller and rounder than the real Sogeking. He wears a mask which resembles that of the real Sogeking but larger and more exaggerated, and does not completely cover his face, as the real one should. The long nose is also part of the mask and the horns are straighter and rounder than the original mask (which was wavy and flat).
He wears striped pants and a dark red cape, similar to Sogeking's, and a plain shirt. He also wears brown boots and a yellow sash for a belt. He has large, curly hair similar to Sogeking's, as well as a thick beard. Underneath the mask reveals his real face to be wide, with thick lips, a relatively flat nose, and round teeth.
Mounblutain is almost always laughing or smiling. Like the other members of the Fake Straw Hats, he uses the name of the real Straw Hats to instill fear in those around him. Upon the truth coming out, he was discovered to be very cowardly, begging Caribou for mercy. He is surprisingly noble, as he was the only one who attacked Caribou in order to save Drip (Fake Sanji), even with the knowledge that he was a Super Rookie with a 210,000,000 bounty on his head.
Abilities and Powers
Mounblutain seems to have at least some endurance, as he was able to stand up after being attacked by carnivorous plants and a massive lighting bolt, although visibly wounded. He also has some strength as was strong enough to pick up Chocolat after passing out in the bar and could lift a large bazooka without much strain. He has a weak will as he easily fainted from Luffy's Haki. Typical for a fraud, he is very weak as he was easily brought to his knees by the Caribou Pirates.
He has been seen using a flintlock pistol, and later a bazooka. Unlike Sogeking, he does not appear to have much skill as a marksman, as he missed the targets he was aiming for at close range (though the closing door blocked his shot)
Return to Sabaody Arc
Posing as the Straw Hat Pirates, Demaro Black (Monkey D. Luffy), Mounblutain (Sogeking), Turco (Franky), and Chocolat (Nami) were trying to recruit new members in a bar on Sabaody Archipelago. When the real Nami spurned his captain's invitation to the crew, Mounblutain commented that the man Nami was waiting for would cry and apologize once he saw (fake) Luffy. As the crew advanced on Nami, they were caught the real Usopp's Midori Boshi: Devil and then struck by lightning from Nami's thunder clouds. The crew survived and went around the archipelago, searching for Nami and Usopp and attacking anyone that closely resembled them. While doing so, they ran into the real Luffy. When Black attempted to shoot Luffy for bumping into him, Luffy used Haoshoku Haki to knock the fake pirates unconscious.
Upon waking up, the crew was met by Manjaro (Roronoa Zoro) and Drip (Sanji) with the real Tony Tony Chopper. After hearing about the capture of Cocoa (Nico Robin), Black ordered the crew to gather their allies to Grove 46.
At Grove 46, Mounblutain stood alongside Black as the captain gave a speech to their new recruits and ordered them to find the people who had insulted him. Manjaro and Drip brought Luffy to the meeting, but before Black could punish Luffy, the Marines surrounded the pirates. As fighting broke out, Sentomaru and two Pacifistas arrived so the fake Straw Hats attempted to flee. Sentomaru knocked out Black and revealed him to be a fake, which angered Black's allies. The rest of the fake crew fled, but stopped in shock when the real Luffy was revealed.
Mounblutain and the other fake Straw Hats (sans Black, Cocoa, and Nora Gitsune) managed to escape the battle but were captured by Caribou and Coribou. The fakes begged for their lives as Coribou prepared to bury them alive. When Caribou started to suffocate Drip with his Devil Fruit powers, Mounblutain fired a bazooka at Caribou, who was unaffected due to his Logia intangibility, and Caribou's men beat Mounblutain into submission.
As Caribou and his crew later disembarked to hunt down the real Straw Hats, Mounblutain's status is unknown.
- Mounblutain appears in One Piece Premier Show 2012 as a member of the Fake Straw Hat Crew, who are captured by Sentomaru.
- His name was written as "Mounbleten" in the 7th character popularity poll.
- In the gag manga One Piece Party, Mounblutain was taken to Impel Down where he encountered the real Usopp during the Straw Hat's escape attempt.