Sepia City Gym & badge infrastructure

Nihon badges now count and Sepia City has its Gym Leader. All fully functional.

I've also distributed the transfer-exclusive Kanto Pokemon items to their relevant owners, plus the Polkadot Bow.

constants/engine_flags.asm

@@ -53,6 +53,15 @@
 	const ENGINE_MARSHBADGE
 	const ENGINE_VOLCANOBADGE
 	const ENGINE_EARTHBADGE
+; wNihonBadges
+	const ENGINE_BADGE1
+	const ENGINE_BADGE2
+	const ENGINE_BADGE3
+	const ENGINE_BADGE4
+	const ENGINE_BADGE5
+	const ENGINE_BADGE6
+	const ENGINE_BADGE7
+	const ENGINE_BADGE8
 ; wUnlockedUnowns
 	const ENGINE_UNLOCKED_UNOWNS_A_TO_K
 	const ENGINE_UNLOCKED_UNOWNS_L_TO_R

constants/event_flags.asm

@@ -1109,7 +1109,8 @@
 	const EVENT_BEAT_ARCHER2
 	const EVENT_BEAT_ARCHER3
 	const EVENT_BEAT_PROFBLUE
-; Unused: next 85 events
+	const EVENT_GOT_TM47_STEEL_WING2
+; Unused: next 86 events
 
 	const_next 1600
 ; Sprite visibility flags

constants/map_constants.asm

@@ -643,6 +643,7 @@ ENDM
 	map_const OLD_CITY_EARLS_HOUSE,                  		 4,  4 ; 5
 	map_const OLD_CITY_FAMILY_HOUSE,                  		 4,  4 ; 6
 	map_const SEPIA_SCHOOL,                  			     4,  8 ; 7
+	map_const OLD_CITY_GYM,									 6, 10 ; 8
 	endgroup
 	
 	newgroup BLUE_FOREST                                          ; 37

constants/trainer_constants.asm

@@ -177,6 +177,7 @@ DEF KRIS EQU __trainer_class__
 	const MATT
 	const SHAW
 	const FREDERICK
+	const NORIKAGE
 
 	trainerclass LASS ; 19
 	const CARRIE

constants/wram_constants.asm

@@ -238,7 +238,20 @@ DEF NUM_JOHTO_BADGES EQU const_value
 	const VOLCANOBADGE
 	const EARTHBADGE
 DEF NUM_KANTO_BADGES EQU const_value
-DEF NUM_BADGES       EQU NUM_JOHTO_BADGES + NUM_KANTO_BADGES
+
+; wNihonBadges::
+	const_def
+	const BADGE1
+	const BADGE2
+	const BADGE3
+	const BADGE4
+	const BADGE5
+	const BADGE6
+	const BADGE7
+	const BADGE8
+DEF NUM_NIHON_BADGES EQU const_value
+
+DEF NUM_BADGES       EQU NUM_JOHTO_BADGES + NUM_KANTO_BADGES + NUM_NIHON_BADGES
 
 ; wPokegearFlags::
 	const_def