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.

data/pokemon/base_stats/wiglett.asm

@@ -15,9 +15,9 @@
 
 	; tm/hm learnset
 	tmhm TOXIC,        BODY_SLAM,    TAKE_DOWN,    DOUBLE_EDGE,  BUBBLEBEAM,   \
-	     WATER_GUN,    RAGE,	     EARTHQUAKE,   FISSURE,      DIG,          \
-	     MIMIC,        DOUBLE_TEAM,  BIDE,         REST,         ROCK_SLIDE,   \
-	     SUBSTITUTE,   CUT,          SURF
+	     WATER_GUN,    RAGE,         EARTHQUAKE,   FISSURE,      DIG,          \
+	     MIMIC,        DOUBLE_TEAM,  BIDE,         REST,         SUBSTITUTE,   \
+	     CUT,          SURF
 	; end
 
 	db BANK(WiglettPicFront)

data/pokemon/base_stats/wugtrio.asm

@@ -17,7 +17,7 @@
 	tmhm TOXIC,        BODY_SLAM,    TAKE_DOWN,    DOUBLE_EDGE,  BUBBLEBEAM,   \
 	     WATER_GUN,    HYPER_BEAM,   RAGE,	       EARTHQUAKE,   FISSURE,      \
 	     DIG,          MIMIC,        DOUBLE_TEAM,  BIDE,         REST,         \
-	     ROCK_SLIDE,   SUBSTITUTE,   CUT,          SURF
+	     SUBSTITUTE,   CUT,          SURF
 	; end
 
 	db BANK(WugtrioPicFront)