Dragon Tamer wrote:
Well, let's face it. He couldn't really be as intimidating as he was before when he was alongside an evil so much more imposing.
This. Red was even worse than first movie Carface. He outright says that Carface is 'an amature' that's been trying. Red's a demon, probably not the devil himself, but still a high ranking demon. Carface was selfish evil, on the other hand, Red was pure evil incarnated. Carface was just pretty much a normal dog, even if he was immortal (I think) at the time, Red was superpowerful and Carface, even from the first film, was nothing compared to his power. He had every right to be afraid of him. Belladonna might even be stronger than Red, that and she was far more mentally unstable, so him working for her makes sense to.
Also, think about it, Carface spent the time between the movies in Heaven, I can't be the only one who assumed that softened him up a bit. And certainly going to Hell between the second film and the series had some effect on him (personally, I feel Belladonna brought him back to life and he was doing her bidding to repay her).