From the Dungeons & Dragons Animated Series Handbook, here are Presto's stats:
"Presto always loved magic, but back on Earth he could hardly do card tricks. When Dungeon Master dubbed him the magician and gave him his hat of many spells, Presto was both frightened and thrilled by the prospect of using real magic. Although Presto possesses amazing intelligence, he lacks self-confidence and often hesitates or gets nervous in dangerous situations, making him appear less smart than he really is. Presto watches his friends do stunning physical feats on a regular basis, which makes him think of himself as weak and clumsy. He knows that magic is his best weapon, so it terrifies him to be without his glasses and thus unable to see what he's casting at."