Add subdirectories to engine/ similar to pokecrystal

engine/pokemon/remove_mon.asm

@@ -0,0 +1,95 @@
+_RemovePokemon::
+	ld hl, wPartyCount
+	ld a, [wRemoveMonFromBox]
+	and a
+	jr z, .asm_7b74
+	ld hl, wNumInBox
+.asm_7b74
+	ld a, [hl]
+	dec a
+	ld [hli], a
+	ld a, [wWhichPokemon]
+	ld c, a
+	ld b, $0
+	add hl, bc
+	ld e, l
+	ld d, h
+	inc de
+.asm_7b81
+	ld a, [de]
+	inc de
+	ld [hli], a
+	inc a
+	jr nz, .asm_7b81
+	ld hl, wPartyMonOT
+	ld d, $5
+	ld a, [wRemoveMonFromBox]
+	and a
+	jr z, .asm_7b97
+	ld hl, wBoxMonOT
+	ld d, $13
+.asm_7b97
+	ld a, [wWhichPokemon]
+	call SkipFixedLengthTextEntries
+	ld a, [wWhichPokemon]
+	cp d
+	jr nz, .asm_7ba6
+	ld [hl], $ff
+	ret
+.asm_7ba6
+	ld d, h
+	ld e, l
+	ld bc, NAME_LENGTH
+	add hl, bc
+	ld bc, wPartyMonNicks
+	ld a, [wRemoveMonFromBox]
+	and a
+	jr z, .asm_7bb8
+	ld bc, wBoxMonNicks
+.asm_7bb8
+	call CopyDataUntil
+	ld hl, wPartyMons
+	ld bc, wPartyMon2 - wPartyMon1
+	ld a, [wRemoveMonFromBox]
+	and a
+	jr z, .asm_7bcd
+	ld hl, wBoxMons
+	ld bc, wBoxMon2 - wBoxMon1
+.asm_7bcd
+	ld a, [wWhichPokemon]
+	call AddNTimes
+	ld d, h
+	ld e, l
+	ld a, [wRemoveMonFromBox]
+	and a
+	jr z, .asm_7be4
+	ld bc, wBoxMon2 - wBoxMon1
+	add hl, bc
+	ld bc, wBoxMonOT
+	jr .asm_7beb
+.asm_7be4
+	ld bc, wPartyMon2 - wPartyMon1
+	add hl, bc
+	ld bc, wPartyMonOT
+.asm_7beb
+	call CopyDataUntil
+	ld hl, wPartyMonNicks
+	ld a, [wRemoveMonFromBox]
+	and a
+	jr z, .asm_7bfa
+	ld hl, wBoxMonNicks
+.asm_7bfa
+	ld bc, NAME_LENGTH
+	ld a, [wWhichPokemon]
+	call AddNTimes
+	ld d, h
+	ld e, l
+	ld bc, NAME_LENGTH
+	add hl, bc
+	ld bc, wPokedexOwned
+	ld a, [wRemoveMonFromBox]
+	and a
+	jr z, .asm_7c15
+	ld bc, wBoxMonNicksEnd
+.asm_7c15
+	jp CopyDataUntil