I got part of the lip up and then could not get a hold of the plug. I took it to one of my friends that works at Midas. They put it up on the rack and used a very long crowbar. It finally popped out. My had a small lip under the rim.
Others on here have used a large bolt and screwed it into the plug and then used the bolt for better leverage to pry it out. Some have gotten it on the first shot, some take forever, and some just push it down into the pan for later recovery.
Hope this helps.