World Pirates

The World Pirates is an anime-only pirate crew founded by Byrnndi World.

History
The World Pirates were formed by Byrnndi World and his brother, Byojack, with the intention of freedom and having adventures. They clashed with many pirates and Marines, and became a formidable threat to the Government.

Jolly Roger
The Jolly Roger is a pirates' skull  with a white helmet with horns, and a yellow mustache shaped like a "W". The symbol has a dim purple circle around it, and "X" crossbones going through.

Crew Strength
The World Pirates are likely a formidable crew, as their captain was a prisoner in Level 6 of Impel Down. In the past, they were capable of causing the World Government to fear their strength that they sent the Cypher Pols to deal with them, which is a testament to their strength. Their captain World was strong enough to have the government call upon all the Shichibukai to fight them.

However, despite their strengths, the main members of the crew were still defeated by Luffy and Hancock alone with both of them only having moderate difficulty defeating them.