Reverse engineer unusual weather events

include/constants/flags.h

@@ -236,7 +236,7 @@
 #define FLAG_MET_WAILMER_TRAINER             0xDA
 #define FLAG_EVIL_LEADER_PLEASE_STOP         0xDB
 
-#define FLAG_UNUSED_0x0DC                    0xDC // Unused Flag
+#define FLAG_NEVER_SET_0x0DC                 0xDC // This flag is read, but never written to
 
 #define FLAG_RECEIVED_GO_GOGGLES             0xDD
 #define FLAG_WINGULL_SENT_ON_ERRAND          0xDE

include/constants/vars.h

@@ -60,7 +60,7 @@
 #define VAR_POISON_STEP_COUNTER              0x402B
 #define VAR_RESET_RTC_ENABLE                 0x402C
 #define VAR_ENIGMA_BERRY_AVAILABLE           0x402D
-#define VAR_0x402E                           0x402E   // Seems to be unused.
+#define VAR_UNUSED_0x402E                    0x402E // Unused Var
 
 #define VAR_FRONTIER_MANIAC_FACILITY         0x402F
 #define VAR_FRONTIER_GAMBLER_FACILITY        0x4030
@@ -71,7 +71,7 @@
 #define VAR_DEOXYS_ROCK_STEP_COUNT           0x4034
 #define VAR_DEOXYS_ROCK_LEVEL                0x4035
 #define VAR_STORAGE_UNKNOWN                  0x4036
-#define VAR_0x4037                           0x4037
+#define VAR_UNUSUAL_WEATHER_LOCATION                           0x4037
 #define VAR_0x4038                           0x4038
 #define VAR_0x4039                           0x4039
 #define VAR_0x403A                           0x403A

include/constants/weather.h

@@ -37,4 +37,30 @@
 #define COORD_EVENT_WEATHER_ROUTE119_CYCLE 20
 #define COORD_EVENT_WEATHER_ROUTE123_CYCLE 21
 
+// These are the "unusual weather events" that are used
+// to find Kyogre and Groudon.
+#define UNUSUAL_WEATHER_COUNT_PER_LEGENDARY 8
+#define UNUSUAL_WEATHER_GROUDON_LOCATIONS_START 1
+#define UNUSUAL_WEATHER_KYOGRE_LOCATIONS_START 1 + UNUSUAL_WEATHER_COUNT_PER_LEGENDARY
+
+#define UNUSUAL_WEATHER_NONE 0
+// Groudon locations
+#define UNUSUAL_WEATHER_ROUTE_114_NORTH 1
+#define UNUSUAL_WEATHER_ROUTE_114_SOUTH 2
+#define UNUSUAL_WEATHER_ROUTE_115_WEST 3
+#define UNUSUAL_WEATHER_ROUTE_115_EAST 4
+#define UNUSUAL_WEATHER_ROUTE_116_NORTH 5
+#define UNUSUAL_WEATHER_ROUTE_116_SOUTH 6
+#define UNUSUAL_WEATHER_ROUTE_118_EAST 7
+#define UNUSUAL_WEATHER_ROUTE_118_WEST 8
+// Kyogre locations
+#define UNUSUAL_WEATHER_ROUTE_105_NORTH 9
+#define UNUSUAL_WEATHER_ROUTE_105_SOUTH 10
+#define UNUSUAL_WEATHER_ROUTE_125_WEST 11
+#define UNUSUAL_WEATHER_ROUTE_125_EAST 12
+#define UNUSUAL_WEATHER_ROUTE_127_NORTH 13
+#define UNUSUAL_WEATHER_ROUTE_127_SOUTH 14
+#define UNUSUAL_WEATHER_ROUTE_129_WEST 15
+#define UNUSUAL_WEATHER_ROUTE_129_EAST 16
+
 #endif // GUARD_CONSTANTS_WEATHER_H