[Other] Edit the floor numbers of maps in Fire Red

[kalarie]

Hi all,

I made a new Rocket Hideout in my hack and I want to change the name of the floor numbers like B4F and B2F. Does anyone have any idea how I can do this?

 

[kalarie]

Still struggling with this.
I'm quite sure that the players' floor is somehow stored in variable 0x403A, which is set in elevator scripts by special 0xD8. But still no idea how to edit it in a map.

 

[Bela]

.

I believe this post will help you with what you're trying to do. What you need to do is... edit the map header!

The dropdown name of the floor you're on is determined by a value in the map header, which you can view by pressing Ctrl+H in Advance Map's header tab. Here's a quick and dirty rundown on what the values mean:

Spoiler:

Pallet Town's Map header as an example: C0D42D08 A8A27108 00000000 6C273508 2C01 4E00 58 00 02 01 01 06 00 00

Bytes 1 - 4: Map footer offset (Pointer)
Bytes 5 - 8: Event offset (Pointer)
Bytes 9 - 12: Map Script Offset (Pointer)
Bytes 13 - 16: Connection Offset (Pointer)
Bytes 17 - 18: Default Music (Little endian)
Bytes 19 - 20: Map ID (Little endian)
Byte 21: Map Name
Byte 22: Cave type
Byte 23: Weather type
Byte 24: The battle lead-in animation (i.e this vs this). If Byte 28 is 00, this byte also controls the battle background.
Byte 25: If 00 the bike can't be used
Byte 26: 'Show name on entering', also connected to Running Shoes permission
Byte 27: Floor number
Byte 28: Battle Background number, closely related to Byte 24

The byte that you need to change if you want to add/ remove/ edit the floor number is byte 27, the second last byte in the header. For most maps the byte is set to 00 which disables the floor feature. Setting the byte to 01 will say you're on F1, 02 is F2, 03 is F3 etc. This pattern ends at 63 (F99) as the game is unable to display a three-digit number as a floor number. You can also use basement floors like in Team Rocket's Celedon hideout by setting the byte to FF which will say you're on B1F, FE will show B2F, FD will show B3F and so on. This continues until 9D (B99F) as once again, the game can't display a three-digit number here.