Design a flag resembling a pirate ship banner with inspiration from the 'One Piece' style. Infuse the design with adventurous and swashbuckling elements, capturing the essence of high-seas exploration. Incorporate bold, dynamic lines and vibrant colors reminiscent of the 'One Piece' aesthetic. Integrate pirate symbols such as skulls, anchors, or crossed swords to enhance the nautical theme. Ensure the flag exudes a sense of excitement, daring, and camaraderie, reminiscent of the adventurous spirit found in 'One Piece.'