How to use FireRed/LeafGreen

How to compile

make firered -j<output of nproc>
or
make leafgreen -j<output of nproc>

Note: If you switch between building emerald and FRLG, make clean is required at the moment.

Porymap adjustments

For Porymap to work with FRLG maps you need to adjust a few settings (Options > Project Settings):

• in the General tab change the base game version to pokefirered

• in the Identifiers tab change the following attributes:
  • define_tiles_primary: NUM_TILES_IN_PRIMARY_FRLG
  • define_metatiles_primary: NUM_METATILES_IN_PRIMARY_FRLG
  • define_pals_primary: NUM_PALS_IN_PRIMARY_FRLG
  • define_mask_behavior: METATILE_ATTR_BEHAVIOR_MASK_FRLG
  • define_mask_layer: METATILE_ATTR_LAYER_MASK_FRLG

How to add maps

For maps to be included in the firered build process they need to have a custom attribute region with the value REGION_KANTO. Not defining this attribute defaults to REGION_HOENN. The attribute can either be added in porymap or manually in the map.json file.

Examples:

map.json:

{
  "id": "MAP_PALLET_TOWN",
  "name": "PalletTown_Frlg",
  "layout": "LAYOUT_PALLET_TOWN",
  "music": "MUS_RG_PALLET",
  "region": "REGION_KANTO",
  ...

Porymap:

Migrating FRLG tilesets

To migrate tilesets that have been previously created for pokefirered you can use this script.
Instructions are in the script.