A couple of bug fixes

More still need to be done but I'm separating the commits so I don't get overwhelmed lol

- Fixes a bug with the Up-Grade NPC in Saffron. He now properly shows up only after defeating Giovanni.

- Fixes a bug where Silph could be entered before receiving the Poke Flute.

- Silph Gauntlet 5F has a complete remodel, more closely matching the original map found in the leaks.

- One of the Fuchsia Gym Trainers no longer uses a repeat Arbok.

- Wiglett and Wugtrio could learn Rock Slide via TM, which has now been fixed.

- Jacky uses a Porygon in place of Machop, as it ties into his polygonal, Virtua Fighter-inspired sprite.

- Chief uses a Gengar instead of Porygon2 to represent the Silph Scope.

- Omega's and Giovanni 2's levels have been toned down slightly.

- Lance now uses Crocky over Aerodactyl.

- Yujirou's non-initial teams have had their levels reduced to be the same level as the previously-fought Gym Leader, rather than the upcoming one.

- Updated README with additional credits.

scripts/SaffronCity.asm

@@ -13,12 +13,11 @@ SaffronCity_TextPointers:
 	dw SaffronCityText9
 	dw SaffronCityText10
 	dw SaffronCityText11
-	dw SaffronCityText12
 	dw SaffronCityText13
 	dw SaffronCityText14
 	dw SaffronCityText15
-	dw SaffronCityText16
 	dw SaffronCityUpGrade
+	dw SaffronCityText16
 	dw SaffronCityText17
 	dw SaffronCityText18
 	dw MartSignText
@@ -73,11 +72,6 @@ SaffronCityText11:
 	text_far _SaffronCityText11
 	text_end
 
-SaffronCityText12:
-	text_far _SaffronCityText12
-	sound_cry_pidgeot
-	text_end
-
 SaffronCityText13:
 	text_far _SaffronCityText13
 	text_end