Looks like they added "c0" type files.
First one found : c0_mt (mother ?)
Now we have :
c1_of (ophiel ?)
c2_ar (ardem ?)
c3_f ( phaleg ? there are some "heat wave" or "kick" attacks for this one so, who know)
Maybe it is just a change for "characters" enemies like Phaleg or Kohri (even though there are some files proving char25 existence) and they started back with cX with X being a number.
Also is "ptm_base" already in the game or is it a new phantom coming soon ?