Powers: Moon Wolf has no known powers, though he believes he can control the crows of Anchorage through his Bag of Enchantment filled with birdseed. Crows do gather and attack at one point, so it's possible he does have some crow-gathering powers. He also believes he is the God of Ice and Snow. There is no evidence to support this claim, however.
History: Moon Wolf is an Native American, possibly an Eskimo, who believes he can talk to the Crow god Chulyen, and is his humble servant. To most of the people of Anchorage, though, he is just a crazy loon.
His ambiguity--is he serving a god or simply crazy?--makes him slightly interesting. In short, he's better than some characters, worse than others.
For more on the subject, see Comic Books Featuring Indians.