Armor appearance change???

What does NOP mean when reffering to this?

"NOP all code from C2/2877 TO C2/2880"

EDIT: From what I read and could understand, this is what I have currently



It gets me a glitched screen in battle, but am I on the right track? I'm sure there's something I'm not understanding, but I'm giving it a shot xD

EDIT2: Figured out what NOP meant o.o

EDIT3: Here's what I got(screen shot would take too long)

C2/2872: A5 C9 LDA $C9 ($11C9)
C2/2874: 20 70 66 JSR $6670
NOP all code from C2/2877 TO C2/2880 (from the opcodes, NOP code is EA So I asusme that mean change each byte here to EA but C2/2881 isn't included?)
C2/2882: 60 RTS

Then in the C2 Bank:

C9 9A CMP #$9A (Genji Armor)
D0 0B BNE $2883 (if not, branch)
8A TXA
0A ASL
0A ASL
0A ASL
0A ASL
A8 TAY
A9 10 LDA #$10 (Leo sprite)
99 AE 2E STA $2EAE,Y

I tried this which I thought would work looking at thread and the Opcodes Madsiur provided(TY SO MUCH!)
and when I enter battle I go to the opening credits o.o. Still not sure what I'm doing wrong >.>. Or right for that matter xD

EDIT4: I GOT IT!!!!!!!!

C2/2872: A5 C9 LDA $C9 ($11C9)
C2/2874: 20 70 66 JSR $6670
C2/2877~C2/2882: EA NOP

Then in the C2 Bank:

C9 9A CMP #$9A (Genji Armor)
D0 0B BNE $2883 (if not, branch)
8A TXA
0A ASL
0A ASL
0A ASL
0A ASL
A8 TAY
A9 10 LDA #$10 (Leo sprite)
99 AE 2E STA $2EAE,Y
60

WORKS LIKE A CHARM! THANKS SO MUCH GUYS!!!!! Especially you Madsiur as always!