So, I placed this into the empty slot and repointed it. I want to place them on the same stage which means I have to input this:

$BF76> A5 31:   LDA CurrentStage
$BF78> C9 09:   CMP #$09                      ; Wily 4 level
$BF80> D0 ##:   BNE ++                        ; $BDBB ($17DCB)

Then, I have 6 screens so I have to make 6 copies of these codes and change the second bytes of each code to be correct? The last entry doesn't need the BEQ code, because it's pointless, right?

$BD82> A0 00:   LDY #$00                      ; Cutman
$BD84> A5 1C:   LDA ScrollPosScreen
$BD86> C9 1D:   CMP #$1D                      ; - Screen Number for Wily 4.
$BD88> F0 ##:   BEQ +                         ; -- $BDB2 ($17DC2)

$BD8A> A0 01:   LDY #$01                      ; Iceman
$BD8C> A5 1D:   LDA ScrollPosScreen
$BD8E> C9 1E:   CMP #$1E                      ; -
$BD90> F0 ##:   BEQ +                         ; --

$BD92> A0 02:   LDY #$02                      ; Bombman
$BD94> A5 1E:   LDA ScrollPosScreen
$BD96> C9 1F:   CMP #$1F                      ; -
$BD98> F0 ##:   BEQ +                         ; --

$BD9A> A0 03:   LDY #$03                      ; Fireman
$BD9C> A5 1F:   LDA ScrollPosScreen
$BD9E> C9 20:   CMP #$20                      ; -
$BDA0> F0 ##:   BEQ +                         ; --

$BDA2> A0 04:   LDY #$04                      ; Elecman
$BDA4> A5 20:   LDA ScrollPosScreen
$BDA6> C9 21:   CMP #$21                      ; -
$BDA8> F0 ##:   BEQ +                         ; --

$BDAA> A0 05:   LDY #$05                      ; Gutsman
$BDAC> A5 21:   LDA ScrollPosScreen
$BDAE> C9 22:   CMP #$22                      ; -
+
$BDB2> 84 AC:   STY FightingBossNum
$BDB4> A9 02:   LDA #$02
$BDB6> 85 3E:   STA BossCurrentStrategy
$BDB8> 4C C7BD: JMP $BDC7 (This is where the 01 special object comes in.)
++
$BDBB> C9 06:   CMP #$06                      ; Works for Wily stages?
$BDBD> F0 0E:   BEQ $BDC3
$BDBF> A6 1B:   LDX ScrollPosScreen
$BDC1> BC D4BD: LDY $BDD4,X
$BDC4> D0 EC:   BNE $BDB2 
$BDC6> A9 01:   LDA #$01
$BDC8> 85 68:   STA ForcedInputFlag
$BDCA> 4C B1BE: JMP RemoveObject              ; $BEB1
$BDCD> A9 42:   LDA #$42
$BDCF> 9D 2004: STA ObjectFlags,X

$BDD2> A0 CC:   LDY #$cc
$BDD4> 20 33F5: JSR InitObjectDefaultSpeed
$BDD7> A9 13:   LDA #$13
$BDD9> 9D E006: STA ObjectType,X              ; Footholder
$BDDC> 20 63F6: JSR CreateEnemy               ; $F663
$BDDF> B0 0F:   BCS $BDE6
$BDE1> A9 02:   LDA #$02
$BDE3> 9D 2004: STA ObjectFlags,X
$BDE6> A0 CC:   LDY #$cc
$BDE8> 20 33F5: JSR InitObjectDefaultSpeed
$BDEA> A9 4C:   LDA #$4c
$BDEC> 9D 8004: STA ObjectPosX,X
$BDEE> 60:      RTS Return

And then these 4 bytes after it are pointless right? So there is no need for them.

Or I just have to add this after the first BEQ in the code instead of having those 6 copies in the coding?

$BD88> F0 0A:   BEQ +                                               ; $BD9E
$BD8A> A0 01:   LDY #$01
$BD8C> F0 08:   BEQ +                                               ; $BD9E
$BD9E> A0 02:   LDY #$02
$BD90> F0 06:   BEQ +                                               ; $BD9E
$BD92> A0 03:   LDY #$03
$BD94> F0 04:   BEQ +                                               ; $BD9E
$BD96> A0 04:   LDY #$04
$BD98> F0 02:   BEQ +                                               ; $BD9e
$BD9A> A0 05:   LDY #$05

$BF76:     [usedspace <-] a5 31 c9 09 d0 37 a0 00 a5 1d
$BF80:  c9 1d f0 26 a0 01 a5 1e c9 1e f0 1e a0 02 a5 1f
$BF90:  c9 1f f0 16 a0 03 a5 20 c9 20 f0 0e a0 04 a5 21
$BFA0:  c9 21 f0 06 a0 05 a5 22 c9 22 84 ac a9 02 85 3e
$BFB0:  4c be bf c9 06 f0 0e a6 1b bc cc bf d0 ec a9 01
$BFC0:  85 68 4c b1 be a9 42 9d 20 04 a0 cc 20 33 f5 a9
$BFD0:  13 9d e0 06 20 63 f6 b0 0f a9 02 9d 20 04 a0 cc
$BFE0:  20 33 f5 a9 4c 9d 80 04 60 [-> unusedspace]