Groundwork for Viridian Pre-Gym

This map is fully functional but has a lot of bits to iron out, as well as a need for Gym Trainers. I'm also not wholly satisfied with Yujirou's team; maybe remove Eevee?

Yes, I designed an entire tileset for this. Fear me. Bow before me. Actually, don't, this was beyond rational thought.

Current issues;
- Yujirou's sprite doesn't work properly.
- Needs Gym Trainers (hell)
- Yujirou needs an event for being beaten, the refight, and more.

data/tilesets/bookshelf_tile_ids.asm

@@ -22,4 +22,5 @@ BookshelfTileIDs:
 	bookshelf_tile LOBBY,        $50, PokemonStuffText
 	bookshelf_tile LOBBY,        $52, PokemonStuffText
 	bookshelf_tile SHIP,         $36, BookOrSculptureText
+	bookshelf_tile PREGYM,		 $57, PokemonStuffText
 	db -1 ; end

data/tilesets/collision_tile_ids.asm

@@ -68,3 +68,7 @@ Facility_Coll::
 
 Plateau_Coll::
 	coll_tiles $1b, $23, $2c, $2d, $3b, $45
+
+PreGym_Coll::
+	coll_tiles $0B, $0E, $1E, $1F
+	;coll_tiles $01, $06, $12, $13, $17, $19, $0A, $1A, $3E, $3F, $0F, $1D, $1C, $0C, $0D, $2A, $2B, $3A, $3B

data/tilesets/tileset_headers.asm

@@ -33,4 +33,5 @@ Tilesets:
 	tileset Club,        $07,$17, -1,  -1, TILEANIM_NONE
 	tileset Facility,    $12, -1, -1,  -1, TILEANIM_WATER
 	tileset Plateau,      -1, -1, -1, $45, TILEANIM_WATER
+	tileset PreGym,		 $20, -1, -1,  -1, TILEANIM_NONE
 	assert_table_length NUM_TILESETS

data/tilesets/warp_tile_ids.asm

@@ -24,6 +24,7 @@ WarpTileIDPointers:
 	dw .ClubWarpTileIDs
 	dw .FacilityWarpTileIDs
 	dw .PlateauWarpTileIDs
+	dw .PreGymWarpTileIDs
 	assert_table_length NUM_TILESETS
 
 MACRO warp_tiles
@@ -91,4 +92,8 @@ ENDM
 	; fallthrough
 .ShipPortWarpTileIDs:
 .ClubWarpTileIDs:
+
+.PreGymWarpTileIDs:
+	warp_tiles $23
+	
 	warp_tiles ; end