The Sumo wrestler from Street Fighter.... but why doesn't he be any chara he wants? Looking for a Hawaian chara is stretching it dear. As long as your costumes good who gives a care about the color of your skin.
also the Principal from Ranma 1/2
Thats a great song...I really liked that movie *gets hit by tomatos for liking a disney movie*
Im with the others, just have him go as who he wants because as much as we talk about there being very few african americans in anime, theres even few of ANY other minority (In fact, the only mexican I can think of is Pedro from Excel Saga, though he is one of the coolest characters ever.)
But if he really wants to play a chara with darker skin, there are a few male characters in "Jungle wa itsumo, Hale nochi Guu". Check it out if you already haven't. you can find fansubs on the internet.