Dumpster Man possesses the power of the colors but he nowhere near as strong as Prentice is and tha is quickly apparent when Prentice easily defeats the man with his mind the first time they come together.
But, is Dumpster Man what he seems to be? Do the color have a negative effect on him making him do things he doesn't want to do? Is someone controlling him? Can he be trusted? Prentice will find out in future stories that everyone has a dark side and there are a lot of people who aren't what they seem to be.