Theodore is most likely a bum, despite the fact that he appears rather young, is strikingly intelligent, and seems to have a lot of expensive possessions. Theodore spends his time hanging around neighborhoods sifting through trash or digging through the local dump. Theodore has a very large bag, filled with 'equipment' that he uses to make strange inventions. He tries to sell these inventions, along with random things he finds in the dump, to passer bys on the street. Many of the more expensive looking things are most likely stolen, though he would never admit it. Theodore also really likes to carry things. Lots of things. He is very friendly and if you are lucky enough to see him on your way home from shopping he will more than gladly carry all your bags for you. When he is not laden with his heavy bag, he is a speedy little bugger, mostly due to his need to run from neighborhood patrols or police.
Edit: A little error has been corrected >.>