Indeed, this was an old mystery that I put to bed some time ago. It is set to be the Deathbringer. I posit that this is part of a removed sequence where the Dark Knight copy would attack Paladin Cecil normally at one point or another...
http://slickproductions.org/forum/index.php?topic=1883.msg22449#msg22449Here is the information on that, but here is the pertinent part of that...
02/D028 AD 4E ED LDA $ED4E [$7E:ED4E] A:0080 X:0000 Y:0012 P:eNvMxdizc - Load Monster... something (Yousei's RAM notes say that ED50 is palette data so it may deal something with size or graphic or something)
$02/D02B 29 10 AND #$10 A:001F X:0000 Y:0012 P:envMxdizc - Get rid of all but 10.
$02/D02D F0 1B BEQ $1B [$D04A] A:0010 X:0000 Y:0012 P:envMxdizc - All normal monsters branch here where Battle Characters continue on.
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$02/D02F A9 18 LDA #$18 A:0010 X:0000 Y:0012 P:envMxdizc - Load Deathbringer into A.
$02/D031 20 BA D8 JSR $D8BA [$02:D8BA] A:0018 X:0000 Y:0012 P:envMxdizc - Jump to Subroutine
The weapon number (yes, singular they never planned on any other weapon being available to Enemy PC's) follows the normal listings.