I was checking out a Super Metroid .smc in Hex Fiend yesterday, and in the ASCII column I found the following enemy list:
.5......5NODATA
....ATOMIC
....BANG
....BATTA1
<...BATTA2
O...BATTA3
b...BOTOON
u...BOYON
....DESSGEEGA
....DORI
....DRAGON
!...EBI
D...EYE
w...NAMI
....FISH
....GAI
....GAMET
....GEEGA
&...GERUDA
9...GRAVY
\\...HACHI1
_...HAND
....HIBASHI
....HIRU
....HOLTZ
....HOTARY
....HZOOMER
....KAGO
....KAME
'...KAMER
z...KANI
....KOMA
....KZAN
.. .LAVAMAN
..!.MELLA
..".MEMU
..#.MERO
/.$.METALEE
B.%.METMOD
U.&.METROID
h.'.MULTI
{.(.MZOOMER ..)
.NDRA
..*.NOMI
..+.NOVA
..,.OUM
..-.OUMU
....PIPE
../.POLYP
..0.PUROMI
&.1.PUU
9.2.PUYO
\\.3.REFLEC
o.4.RINKA
..5.RIO
..6.RIPPER
..7.RIPPER2
..8.ROBO
..9.RSTONE
..:.SABOTEN
..;.SBUG
..<.SCLAYD
..=.SDEATH
-.>.SHUTTER
@.?.SHUTTER2
S.@.SIDE
f.A.SKREE
y.B.SPA
..C.SQUEEWPT
..D.SSIDE
..E.STOKE
..F.TOGE
..G.VIOLA
..H.WAVER
..I.YARD
!.J.ZEB
4.K.ZEBBO
G.L.ZEELA
Z.M.ZOA
m.N.ZOOMER
..O.BATTA1Br
..P.BATTA1No
..Q.BATTA1Na
..R.BATTA1Ma
..S.BATTA1Tu
..T.BATTA2Br
..U.BATTA2No
..V.BATTA2Na
..W.BATTA2Ma
+.X.BATTA2Tu
>.Y.BATTA3Br
Q.Z.BATTA3No
d.[.BATTA3Na
w.\\.BATTA3Ma
..].BATTA3Tu
..^.FUNE
.._.HACHI2
..`.HACHI3
..a.ROBO2
There's not much that translates into english on this ROM, so it got me curious. If I replace enemy names with other enemy names with a different amount of characters, undesirable graphical effects occur. So it must require replacing with the same amount of characters. I tried replacing all four-character enemy names with FISH and five-character enemy names with STOKE. I tested it out, and it has no effect whatsoever. Same goes with reordering the 1-9 or A-Z and other characters that you'll see next to many of the names. So, this brings me to the conclusion, what are these for in the first place?
My only guess is that this was some kind of reference table for the level designers.