Doctor Who Bob is the puppet of an unknown actor. He quickly took sides with the Whovians after the outbreak of the Who Wars.
Connor Farley recently declared that Chameleon Tours was behind the character one morning at 6am during a tense internet argument, despite the fact that Bob preceded Chameleon's arrival in the community by half a year, holds opinions that are the antithesis of Chameleon's, and has an accent that is obviously not Australian. Needless to say he has been mocked for this on many occasions.
Mike D famously threatened to 'beat up' the puppet.