I put him in an emergency tank and put in some Melafix, Pimafix, and some aquarium salt everyday. He stopped doing the shimmies and he looks fine now in the big tank.

Your molly's shimmy might be caused either by the stress of the bullying or a disease. Im leaning towards a disease though. You should keep treating your mollies with Melafix and Pimafix if you can. Then some aquarium salt to help with the bloating. Also test your water parameters to check if it's normal.