Is there any bus from Pudong Airport to Pullman Shanghai South after 12 midnight?

Well, there is no direct bus. You may take shuttle bus Night Line from PVG to Middle Yan'an Road, Huashan Road Station. The buses operate until 45 minutes after flights finsh. The fare is about CNY 25. Upon arrival, take a taxi to the hotel for about CNY 30 to 40.

Or, you can take a taxi to the hotel from PVG. The fare may be around CNY 220. ;)