A few cool changes

- Pokemon Mansion has a Guard NPC now
- Professor Oak now plays the Champion theme when you fight him.

scripts/HallOfFame.asm

@@ -103,6 +103,9 @@ HallofFameRoomScript1:
 	ld a, HS_ROUTE_1_OAK
 	ld [wMissableObjectIndex], a
 	predef ShowObject
+	ld a, HS_MANSION_GUARD
+	ld [wMissableObjectIndex], a
+	predef HideObject
 	ld a, $2
 	ld [wHallOfFameCurScript], a
 	ret

scripts/PokemonMansionB1F.asm

@@ -68,6 +68,7 @@ PokemonMansionB1F_TextPointers:
 	dw Mansion4Text7
 	dw PickUpItemText
 	dw Mansion3Text6
+	dw MansionGuardText
 
 Mansion4TrainerHeaders:
 	def_trainers
@@ -116,3 +117,7 @@ Mansion4AfterBattleText2:
 Mansion4Text7:
 	text_far _Mansion4Text7
 	text_end
+
+MansionGuardText:
+	text_far _MansionGuardText
+	text_end