You save (one gets used to doing that very often) then talk to the wizard. Be polite but be persistent. He'll spend a lot of the time screaming at his transformed apprentice. Then he'll ask you if you can help him reverse the process (I think). You say sure. You go get a skull from outside (he needs one). Now, SAVE - THIS IS IMPORTANT! Talk to the wizard. He'll attempt to restore Melicamp to his true form, but often Melicamp explodes instead. In that case, reload and try again.
I'm not sure but I think thats about what to do.
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Kazara
Waitress at Cloudy's Cafe