Add title screen monsters from Green and Blue as well.

Having data from all versions is a long‐term goal, but until the
ROMs for those versions can be easily built and compared to the
originals, it will be very easy for errors to slip in. Adding stuff
from Green, Blue, and Yellow is okay with me, but for now Red is
the only version guaranteed to have correct data.

hg-commit-id: c595f0981208

constants.asm

@@ -1,3 +1,7 @@
+RED EQU 1
+BLUE EQU 0
+GREEN EQU 0
+
 FuncCoord: MACRO
 Coord = $C3A0 + 20 * \2 + \1
 	ENDM

pokered.asm

@@ -1182,6 +1182,7 @@ INCBIN "baserom.gbc",$425B,$4588-$425B
 
 TitleMons: ; 4588
 ; mons on the title screen are randomly chosen from here
+IF RED
 	db CHARMANDER
 	db SQUIRTLE
 	db BULBASAUR
@@ -1198,6 +1199,43 @@ TitleMons: ; 4588
 	db ONIX
 	db PONYTA
 	db MAGIKARP
+ENDC
+IF GREEN
+	db BULBASAUR
+	db CHARMANDER
+	db SQUIRTLE
+	db CATERPIE
+	db NIDORAN_F
+	db PINSIR
+	db PIKACHU
+	db CLEFAIRY
+	db RHYDON
+	db ABRA
+	db GASTLY
+	db DITTO
+	db PIDGEOTTO
+	db ONIX
+	db PONYTA
+	db MAGIKARP
+ENDC
+IF BLUE
+	db SQUIRTLE
+	db CHARMANDER
+	db BULBASAUR
+	db MANKEY
+	db HITMONLEE
+	db VULPIX
+	db CHANSEY
+	db AERODACTYL
+	db JOLTEON
+	db SNORLAX
+	db GLOOM
+	db POLIWAG
+	db DODUO
+	db PORYGON
+	db GENGAR
+	db RAICHU
+ENDC
 
 INCBIN "baserom.gbc",$4598,$5AF2-$4598