ref: b9a113a9f4712771e37313a4c8a76f7ef23cebb2
dir: /data/wild/maps/Route18.asm/
Route18Mons: db 25 ; grass encounter rate db 20, SPEAROW db 22, SPEAROW db 25, RATICATE db 24, DODUO db 25, FEAROW db 26, DODUO db 28, DODUO db 29, RATICATE db 27, FEAROW db 29, FEAROW db 0 ; water encounter rate