Bokoblins are a common enemy that is found throughout Wind Waker and come in three different varities; green, blue and pink. The pink kind carries a telescope, while the blue one will usually have either a Boko Stick or a Machete. The green ones are the toughest ones, since they have the most health and carry a shield and a Machete.
They usually move left and right before jumping and trying to attack Link, although the green kind tend to block more often. Whenever you see an opening, make sure to attack. Bokoblins are scared of Bombs, even accidentally stepping off ledges to get away from them. They can drop Joy Pendants when they are killed, and you can steal them with the Grappling Hook.
