Bokoblin

Bokoblins are the common infantry unit, alongside Moblins under Ganondorf in recent Zelda games.

The Wind Waker
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Bokoblins are very common in The Wind Waker, the most often seen variant being the blue-skinned, Boko stick-wielding, combat form, though they can wield any weapon with ease. Green Elites can carry shields for extra defense. They are also capable of great feats of strength, being able to wield weapons such as Pikes and Darknut Swords with one arm without any hindrance. The attack power remains the same, however. Unlike Moblins, Bokoblins have more bat-like faces, and come in three different variants:

Blue (Ordinary) Green (Elite) Pink (Scout)

Bokoblins, in any form, always carry Joy Pendants. They are easily stolen by the Grappling Hook. They are also much more intelligent than their Moblin counterparts. They are scared of bombs and will run away, if Link pulls one out.

Twilight Princess
In Twilight Princess, they are just as short, and are much less intelligent. They are more common in the Southern and parts of the Eastern areas of Hyrule Field, and are prominent in Faron Woods at the beginning of the game, but are driven out by Link as he is traversing the Forest Temple. They are more imp-like in appearance than their Wind Waker counterparts. They are first encountered in their blue-skinned variant, which carries a small stick and is easily felled. Later, they will appear purple, and wield swords. Purple Bokoblins are surprisingly resilient, taking very much abuse before death. They share their blue counterpart's mental drawbacks, however. It is possible that the two colors of the Bokoblin could indicate different genders, however this is merely a speculation. Bokoblins in Twilight Princess are not to be confused with Bulblins.They are not completley brainless, at the beginning of Twilight princess two can be seen talking with one another in an area of Faron, and somewhere near the forest temple path.