Hmm, I saw a bunch of what I now assume must've been bootlegs at liberty in akihabara two weeks ago. I'm back in the states now, so I can't check, but they were baffling to me because they were in the PC engine section, but had no PCE designation on them. I was worried I'd walk home with a drama CD or something (I think they might've been cds, not carts).
Oh well...next time. Unless someone else is in Tokyo and wants to check it out?