23rd Oct: It's time for the second TV Tropes Halloween Avatar Contest, theme: cute monsters! Details and voting here.
Bubs is a Timelord......and his concession stand is his TARDIS (how many concession stands have you seen with elevators?). Also, he is the original Bubs: The "other" original Bubs and onion Bubs are prior regenerations.
Homsar is a Dalek.Like Dalek Caan, he tried to break the Time Lock on the Time War, and went insane. He painted his shell and glued feet onto the bottom, but doesn't really need them (note how often he hovers, as Daleks do).
The Cheat is a Time Lord.This explains why he is always called "The Cheat" even in context like "Awesome! My very own a The Cheat!". His TARDIS is the King of Town's grill, explaning how Strong Sad can fit in it. His incarnations are The Sneak, Ilko Skevüld, current incarnation, and Cheatball.
Sarge is a Time Lord.Firstly, I apologize. Still, there's a better case for him than most people the label is applied to. I mean, only refered to by a label, mechanical brilliance combined with... eccentricity, comes back from the dead, companions (Lopez, Simmons), and an impressive amount of knowledge of chronal shennanigans. I mean, the man figured out about a bomb destroying the present. If that isn't insider knowledge, what is?