actually, yes, it can drop only a fire crystal because you don't get drops from killing the monsters, you get the drops from opening the chest at the end of the BCNM. You'll know what drops when they add this BCNM to the site. As such, I never heard of this BCNM, looks fun.
Lol it's from SM9-2 as stated below :P I didnt see any of them drop fire crystals >_> so I dunno lol, but the only rewards for beating it is a lot of CSs, 100k, rank 10, and a flag lol