Pikkon is a very wise fighter. He uses this to his advantage by planning out attacks. Pikkon has heroic characteristics similar to Goku's, and fights for the good. You could probably compare him mostly to a non-canon version of Piccolo, and that’s what we’re probably going for in the voice. 

We’re looking for a deep, heroic type voice for Pikkon, almost as a parody of other super-hero’s. With the manner you do this in is your choice, you can copy the dub or do something new, but either way I’d love to see how you do!