Kid Pirates

The Kid Pirates (キッド海賊団) are an infamous and notable rookie pirate crew introduced during the Sabaody Archipelago arc during the time the Straw Hat Pirates arrived there. Like the Straw Hats, this crew has two bounties above one-hundred million beli, but both members have slightly higher bounties than the respective members of the Straw Hat crew. This is, however, due to a decision passed by the World Government in order to cover up the defeat of Shichibukai Gecko Moria.

Pirate Flag
The flag utilized by the Kid Pirates is atypical in the sense that it is a smiley of some sort with a stitched together mouth rather than the typical Jolly Roger.

Crewmates
The most significant representation passed along by most, if not all, of the Kid Pirates is their Heavy Metal-esque appearance and the fact that many of them seem to wear leather in one way or another.

Crew Strength
They are most known for dealing major township destruction and citizen casualties along their route through the Grand Line and towards the New World. Furthermore, the entire crew easily survived the blast of Haki released by Silvers Rayleigh, testament to their overall hardiness. In spite of their great potency in battle and overall level-mindedness, the members of this crew display an inane sense of haughtiness.

Trivia

 * There is possibly a heavy metal or rock theme to the crew, considering Kidd's rock star resemblance, Killer by wearing a helmet which look like those used by Daft Punk and the fire-breathing crew member looks like the Iron Maiden Mascot, Eddie.
 * Their flag greatly reassembles a smiley used by the Hard Rock/Nu Metal band Stone Sour