Expanding on Pokemon icon usage

This adds Pikachu, Cat, and "Small Bird" menu icons. The cat has a custom animation done by myself.

The Jigglypuff in the Pokemon Centre now uses the new sprite, nice 'n' pretty. Officer Jenny is also in Cerulean. The Pokemon from Melanie's house in Yellow have been put in Mr. Fuji's House, given the purpose of the house in RB is different. I think it ends up fitting very nicely.

Chansey has been given its proper sprite in Fuschia. Yellow didn't actually do this, as Chansey doesn't have a walk cycle, causing the stuff that exists to go unused. I wanted it, though, so I had Chansey just not walk and turn around. Oh, and it's in all the Pokemon Centres now. Yeah, that's a...lot of changed files.

engine/gfx/mon_icons.asm

@@ -1,3 +1,4 @@
+;Backported from Yellow
 AnimatePartyMon_ForceSpeed1:
 	xor a
 	ld [wCurrentMenuItem], a
@@ -91,7 +92,7 @@ PartyMonSpeeds:
 LoadMonPartySpriteGfx:
 ; Load mon party sprite tile patterns into VRAM during V-blank.
 	ld hl, MonPartySpritePointers
-	ld a, $1c
+	ld a, $22 ; Number of pointers in the list in hex. eg. Yellow has 30, so 1E is used.
 
 LoadAnimSpriteGfx:
 ; Load animated sprite tile patterns into VRAM during V-blank. hl is the address
@@ -130,7 +131,7 @@ LoadMonPartySpriteGfxWithLCDDisabled:
 ; LCD.
 	call DisableLCD
 	ld hl, MonPartySpritePointers
-	ld a, $1c
+	ld a, $24 ; Number of pointers in the list in hex. eg. Yellow has 30, so 1E is used.
 	ld bc, $0
 .loop
 	push af
@@ -151,7 +152,7 @@ LoadMonPartySpriteGfxWithLCDDisabled:
 	inc hl
 	ld d, [hl]
 	pop hl
-	call FarCopyData2
+	call FarCopyData
 	pop hl
 	pop bc
 	ld a, $6
@@ -170,6 +171,8 @@ WriteMonPartySpriteOAMByPartyIndex:
 	push de
 	push bc
 	ldh a, [hPartyMonIndex]
+	cp $ff
+	jr z, .asm_7191f
 	ld hl, wPartySpecies
 	ld e, a
 	ld d, 0
@@ -183,6 +186,16 @@ WriteMonPartySpriteOAMByPartyIndex:
 	pop hl
 	ret
 
+.asm_7191f
+	ld hl, wShadowOAM
+	ld de, wMonPartySpritesSavedOAM
+	ld bc, $60
+	call CopyData
+	pop bc
+	pop de
+	pop hl
+	ret
+
 WriteMonPartySpriteOAMBySpecies:
 ; Write OAM blocks for the party sprite of the species in
 ; [wMonPartySpriteSpecies].
@@ -193,43 +206,43 @@ WriteMonPartySpriteOAMBySpecies:
 	ld [wOAMBaseTile], a
 	jr WriteMonPartySpriteOAM
 
-UnusedPartyMonSpriteFunction:
+;UnusedPartyMonSpriteFunction:
 ; This function is unused and doesn't appear to do anything useful. It looks
 ; like it may have been intended to load the tile patterns and OAM data for
 ; the mon party sprite associated with the species in [wcf91].
 ; However, its calculations are off and it loads garbage data.
-	ld a, [wcf91]
-	call GetPartyMonSpriteID
-	push af
-	ld hl, vSprites tile $00
-	call .LoadTilePatterns
-	pop af
-	add $54
-	ld hl, vSprites tile $04
-	call .LoadTilePatterns
-	xor a
-	ld [wMonPartySpriteSpecies], a
-	jr WriteMonPartySpriteOAMBySpecies
+;	ld a, [wcf91]
+;	call GetPartyMonSpriteID
+;	push af
+;	ld hl, vSprites tile $00
+;	call .LoadTilePatterns
+;	pop af
+;	add $5A
+;	ld hl, vSprites tile $04
+;	call .LoadTilePatterns
+;	xor a
+;	ld [wMonPartySpriteSpecies], a
+;	jr WriteMonPartySpriteOAMBySpecies
 
-.LoadTilePatterns
-	push hl
-	add a
-	ld c, a
-	ld b, 0
-	ld hl, MonPartySpritePointers
-	add hl, bc
-	add hl, bc
-	add hl, bc
-	ld a, [hli]
-	ld e, a
-	ld a, [hli]
-	ld d, a
-	ld a, [hli]
-	ld c, a
-	ld a, [hli]
-	ld b, a
-	pop hl
-	jp CopyVideoData
+;.LoadTilePatterns
+;	push hl
+;	add a
+;	ld c, a
+;	ld b, 0
+;	ld hl, MonPartySpritePointers
+;	add hl, bc
+;	add hl, bc
+;	add hl, bc
+;	ld a, [hli]
+;	ld e, a
+;	ld a, [hli]
+;	ld d, a
+;	ld a, [hli]
+;	ld c, a
+;	ld a, [hli]
+;	ld b, a
+;	pop hl
+;	jp CopyVideoData
 
 WriteMonPartySpriteOAM:
 ; Write the OAM blocks for the first animation frame into the OAM buffer and
@@ -291,5 +304,7 @@ SnakeIconFrame1:     INCBIN "gfx/icons/snake.2bpp", INC_FRAME_1
 QuadrupedIconFrame1: INCBIN "gfx/icons/quadruped.2bpp", INC_FRAME_1
 SnakeIconFrame2:     INCBIN "gfx/icons/snake.2bpp", INC_FRAME_2
 QuadrupedIconFrame2: INCBIN "gfx/icons/quadruped.2bpp", INC_FRAME_2
+CatIconFrame1:		 INCBIN "gfx/icons/cat.2bpp", INC_FRAME_1
+CatIconFrame2:		 INCBIN "gfx/icons/cat.2bpp", INC_FRAME_2
 
 TradeBubbleIconGFX:  INCBIN "gfx/trade/bubble.2bpp"