However, if you side with the town, he mysteriously mentions his bum leg as the reason for why he can't participate in the fight. This doesn't make sense. Why would he only attack the powders if you're helping them take over Good springs? He had just spent days saving your life, and he strikes me as the type of person who would be against violence anyway (since he is a doctor and from his dialogue), plus of course that bum leg should have stopped him, so what's up with him joining the fight.
Also I wonder why Sunny smiles wasn't made available as a companion, she seems like an obvious choice.