ref: 7bcb4b19c77eee2b8d2c3e769d25e7e4d7d028a7 dir: /data/maps/headers/Route20.asm/
map_header Route20, ROUTE_20, OVERWORLD, WEST | EAST connection west, CinnabarIsland, CINNABAR_ISLAND, 0 connection east, Route19, ROUTE_19, -18 end_map_header