I always thought this was a bootleg, obviously colored up to match the Bullmark. I never bought one, so I cannot tell you if it was the Marusan originals fake kaiju or not, but I did not think it was for some reason. The Ghidrah is insane, and it looks like the wings are indeed the bat-kaiju but the heads look like they are cast off of the Bullmark. Bonkers!
Got my copy from S7 but they seem to be out. Maybe a distro has one hiding somewhere. Here is the link to AmazonJP (tried tinyURL but did not work correctly): http://www.amazon.co.jp/%E3%82%A6%E3%83 ... =miro02-22
