after the update i found out that you can fight the baron more than once by training in zone 2, im not sure maybe you could do this before but it never happend to me-
you could always do this, its hard since he only had a 10% chance of appearing, but its kool, go fight him when your level 30 and hit him with your highest attack when he has holy scars.. i do 200k xD
Wait... there was an update? Fighting the Baron again would be nice but i wouldn't just do it for kinks I'd need to get some super awesome equipment from him