Nihon Gate maps/tileset

This adds the Nihon Gate tileset and gives Nihon its own gate style.

Kanto can be done another time.

maps/Route49OldCityGate2F.asm

@@ -0,0 +1,77 @@
+	object_const_def
+	const ROUTE49OLDCITYGATE2F_LASS
+	const ROUTE49OLDCITYGATE2F_TWIN
+
+Route49OldCityGate2F_MapScripts:
+	def_scene_scripts
+
+	def_callbacks
+
+Route49OldCityGate2FLassScript:
+	jumptextfaceplayer Route49OldCityGate2FLassText
+
+Route49OldCityGate2FLassText:
+	text "JOHTO? That's where"
+	line "KURT is, right?"
+	
+	para "He visits here so-"
+	line "metimes to show us"
+	cont "his # BALL"
+	cont "craft."
+	
+	para "They say if you"
+	line "can get on his"
+	cont "good side, you'll"
+	cont "have made it as"
+	cont "a TRAINER!"
+	done
+
+Route49OldCityGate2FTwinScript:
+	jumptextfaceplayer Route49OldCityGate2FTwinText
+
+Route49OldCityGate2FTwinText:
+	text "You're a tourist?"
+	line "That's too bad."
+	
+	para "GROWLITHE TOWER"
+	line "isn't open to just"
+	cont "anyone."
+	done
+
+Route49OldCityGate2FTelescopeScript1:
+	jumptext Route49OldCityGate2FTelescopeText1
+
+Route49OldCityGate2FTelescopeScript2:
+	jumptext Route49OldCityGate2FTelescopeText2
+
+Route49OldCityGate2FTelescopeText1:
+	text "<PLAYER> peeked"
+	line "into a telescope!"
+	
+	para "Whoa! There's a"
+	line "tall, tall tower!"
+	done
+
+Route49OldCityGate2FTelescopeText2:
+	text "<PLAYER> peeked"
+	line "into a telescope!"
+	
+	para "Hm? There's a"
+	line "long, long river."
+	done
+
+Route49OldCityGate2F_MapEvents:
+	db 0, 0 ; filler
+
+	def_warp_events
+	warp_event  5,  0, ROUTE_49_OLD_CITY_GATE_1F, 5
+
+	def_coord_events
+
+	def_bg_events
+	bg_event  1,  0, BGEVENT_READ, Route49OldCityGate2FTelescopeScript1
+	bg_event  3,  0, BGEVENT_READ, Route49OldCityGate2FTelescopeScript2
+
+	def_object_events
+	object_event  2,  2, SPRITE_LASS, SPRITEMOVEDATA_WALK_LEFT_RIGHT, 0, 0, -1, -1, 0, OBJECTTYPE_SCRIPT, 0, Route49OldCityGate2FLassScript, -1
+	object_event  5,  4, SPRITE_TWIN, SPRITEMOVEDATA_WALK_LEFT_RIGHT, 0, 0, -1, -1, 0, OBJECTTYPE_SCRIPT, 0, Route49OldCityGate2FTwinScript, -1