Kozmo was far the best villain in the series.
His connection with the cape and the fact he was Max's former rogue apprentice made him the most dangerous enemy because he knew everything that The Cape knew,maybe even more.
He was very obsessed as every good villain should be, backed up by powerful abilities like the mind reading thing(still not sure how he did that) and the cool card throwing ability.
His interactions with Orwell were also very good, especially the palm reading scene.
The Kozmo the Unkillable myth was also very cool.The final fight scene was a little short, however.