How to change the birch battle in the beginning of Emerald?

[zuensei]

Hi folks,

I am currently doing my first ROM hack, which will be a remake for Emerald. I want to change the very first battle where you save prof. Birch, but i am not very good at scripting.
I want to change the battle from the standard zigzagoon to a Marill. I am using Advance map and XSE. I assume the script i will have to edit is that of the bag on the floor, but i am not sure what value to change, and to what.
This is the script that the bag gives you:

'---------------
#org 0x1EBE16
lock
faceplayer
setflag 0x860
setflag 0x52
fadescreen 0x1
hidesprite 0x4
movesprite 0xFF 0x6 0xD
applymovement MOVE_PLAYER 0x82725A4
waitmovement 0x0
special 0x9F
waitstate
applymovement 0x2 0x81EBE8D
waitmovement 0x0
msgbox 0x81EBF12 MSG_KEEPOPEN '"PROF. BIRCH: Whew[.]\pI was in the..."
special 0x0
setflag 0x2D0
clearflag 0x2D1
setflag 0x2BC
setvar 0x4084 0x2
setvar 0x4060 0x3
clearflag 0x4000
checkgender
compare LASTRESULT 0x0
if 0x1 call 0x81EBE85
compare LASTRESULT 0x1
if 0x1 call 0x81EBE89
warp 0x1 0x4 0xFF 0x6 0x5
waitstate
release
end

'---------------
#org 0x1EBE85
setflag 0x2D2
return

'---------------
#org 0x1EBE89
setflag 0x2F8
return


'---------
' Strings
'---------
#org 0x1EBF12
= PROF. BIRCH: Whew[.]\pI was in the tall grass studying wild\nPOKéMON when I was jumped.\pYou saved me.\nThanks a lot!\pOh?\pHi, you're [player]\v\h05!\pThis is not the place to chat, so come\nby my POKéMON LAB later, okay?


'-----------
' Movements
'-----------
#org 0x2725A4
#raw 0x27 'Step on the Spot Left (Fastest)
#raw 0xFE 'End of Movements

#org 0x1EBE8D
#raw 0xB 'Step Right (Normal)
#raw 0xFE 'End of Movements


If anyone could help me out here that would be amazing! Thanks in advance.

 

[Anon822]

You can't edit that zigzagoon by editing that script, its species is defined in the game's code (as shown here).
Since you're not using decomp, you will have to find the offset of the bytes that correspond with that SPECIES_ZIGZAGOON in the code. I would imagine someone has posted it on these forums at some point but I couldn't find it with a quick search.

 

[Mahian23]

Hi folks,

I am currently doing my first ROM hack, which will be a remake for Emerald. I want to change the very first battle where you save prof. Birch, but i am not very good at scripting.
I want to change the battle from the standard zigzagoon to a Marill. I am using Advance map and XSE. I assume the script i will have to edit is that of the bag on the floor, but i am not sure what value to change, and to what.
This is the script that the bag gives you:

'---------------
#org 0x1EBE16
lock
faceplayer
setflag 0x860
setflag 0x52
fadescreen 0x1
hidesprite 0x4
movesprite 0xFF 0x6 0xD
applymovement MOVE_PLAYER 0x82725A4
waitmovement 0x0
special 0x9F
waitstate
applymovement 0x2 0x81EBE8D
waitmovement 0x0
msgbox 0x81EBF12 MSG_KEEPOPEN '"PROF. BIRCH: Whew[.]\pI was in the..."
special 0x0
setflag 0x2D0
clearflag 0x2D1
setflag 0x2BC
setvar 0x4084 0x2
setvar 0x4060 0x3
clearflag 0x4000
checkgender
compare LASTRESULT 0x0
if 0x1 call 0x81EBE85
compare LASTRESULT 0x1
if 0x1 call 0x81EBE89
warp 0x1 0x4 0xFF 0x6 0x5
waitstate
release
end

'---------------
#org 0x1EBE85
setflag 0x2D2
return

'---------------
#org 0x1EBE89
setflag 0x2F8
return


'---------
' Strings
'---------
#org 0x1EBF12
= PROF. BIRCH: Whew[.]\pI was in the tall grass studying wild\nPOKéMON when I was jumped.\pYou saved me.\nThanks a lot!\pOh?\pHi, you're [player]\v\h05!\pThis is not the place to chat, so come\nby my POKéMON LAB later, okay?


'-----------
' Movements
'-----------
#org 0x2725A4
#raw 0x27 'Step on the Spot Left (Fastest)
#raw 0xFE 'End of Movements

#org 0x1EBE8D
#raw 0xB 'Step Right (Normal)
#raw 0xFE 'End of Movements


If anyone could help me out here that would be amazing! Thanks in advance.

It will take a lot of effort.You can replace the whole script,Do some hex editings or you can just avoid the script.Change the map connections in advance map and you're all set.