On the DVD commentary Doc Hammer explains how the red faced man effect is created:
"That is a lot of work"
"Jackson sits in-front of one of my unfinished paintings because they're dark. He wears a skirt around his shoulder (laughs about how he's not joking about any of this) with a binder clip keeping it tight to his neck (so he can't move). Then we play the audio that was recorded months beforehand (while shining a 500w bulb 5 inches from his head) and then we either film him with a digital camera, that time we knew it was going to be kind of small so it was the iCam® taped to a tripod. Then I take it into After Effects and do all that stretching and then I remove the color and put in new color and place it into the scene."
"That is a lot of work"
"Jackson sits in-front of one of my unfinished paintings because they're dark. He wears a skirt around his shoulder (laughs about how he's not joking about any of this) with a binder clip keeping it tight to his neck (so he can't move). Then we play the audio that was recorded months beforehand (while shining a 500w bulb 5 inches from his head) and then we either film him with a digital camera, that time we knew it was going to be kind of small so it was the iCam® taped to a tripod. Then I take it into After Effects and do all that stretching and then I remove the color and put in new color and place it into the scene."
According to Doc Hammer on the DVD commentary the reason Dr. Girlfriend has such a deep voice is simply "because it's funny".
Doctor Killinger officiates the wedding of the Monarch and Doctor Girlfriend.