Sprite changing stuff?

00083570: 27bdffd8 addiu r29,r29,0xffd8
00083574: afb00010 sw r16,0x0010(r29)
00083578: 00808021 addu r16,r4,r0
0008357c: afbf0020 sw r31,0x0020(r29)
00083580: afb3001c sw r19,0x001c(r29)
00083584: afb20018 sw r18,0x0018(r29)
00083588: afb10014 sw r17,0x0014(r29)
0008358c: 8e030144 lw r3,0x0144(r16)
00083590: 00000000 nop
00083594: 3062000f andi r2,r3,0x000f
00083598: 10400039 beq r2,r0,0x00083680		branch if not changing sprite
0008359c: 00a09821 addu r19,r5,r0
000835a0: 30620001 andi r2,r3,0x0001
000835a4: 10400008 beq r2,r0,0x000835c8		branch if not crystalising
000835a8: 34040009 ori r4,r0,0x0009
000835ac: 3412009b ori r18,r0,0x009b
000835b0: 02003021 addu r6,r16,r0
000835b4: 86050070 lh r5,0x0070(r16)		load facing
000835b8: 34020060 ori r2,r0,0x0060
000835bc: a602007a sh r2,0x007a(r16)		If crystalising, set graphic Y offset to 0x60 pixels
000835c0: 08020d7a j 0x000835e8
000835c4: 34020001 ori r2,r0,0x0001			set only crystal status
000835c8: 30620008 andi r2,r3,0x0008
000835cc: 1040000b beq r2,r0,0x000835fc		branch if not treasurizing
000835d0: 34040015 ori r4,r0,0x0015
000835d4: 3412009e ori r18,r0,0x009e
000835d8: 02003021 addu r6,r16,r0
000835dc: 86050070 lh r5,0x0070(r16)
000835e0: 34020008 ori r2,r0,0x0008
000835e4: a600007a sh r0,0x007a(r16)			If treasurising, don't set any graphic offset (unique pair of animations; not required)
000835e8: ae020144 sw r2,0x0144(r16)
000835ec: 0c02065e jal 0x00081978
000835f0: ae000140 sw r0,0x0140(r16)
000835f4: 08020d89 j 0x00083624
000835f8: 00000000 nop
000835fc: 30620002 andi r2,r3,0x0002
00083600: 10400004 beq r2,r0,0x00083614		branch if not chicken/crystal removal
00083604: 30620004 andi r2,r3,0x0004
00083608: 3412009c ori r18,r0,0x009c
0008360c: 08020d89 j 0x00083624
00083610: a600007a sh r0,0x007a(r16)			If removing chicken/crystal/frog, remove graphic Y offset
00083614: 10400003 beq r2,r0,0x00083624		branch if not frog
00083618: 34020030 ori r2,r0,0x0030
0008361c: 3412009d ori r18,r0,0x009d
00083620: a602007a sh r2,0x007a(r16)			if being frogged, set graphic offset to 0x30 pixels.
00083624: 92020006 lbu r2,0x0006(r16)
00083628: 3251ffff andi r17,r18,0xffff
0008362c: 10510042 beq r2,r17,0x00083738	jump to end if spritesheet ID = -1 (invalid)
00083630: 2c42009b sltiu r2,r2,0x009b
00083634: 10400005 beq r2,r0,0x0008364c		branch if spritesheet ID is less than crystal (any legal spritesheet)
00083638: 00000000 nop
0008363c: 8e0201f4 lw r2,0x01f4(r16)
00083640: 8e0301f8 lw r3,0x01f8(r16)
00083644: ae0201fc sw r2,0x01fc(r16)
00083648: ae030200 sw r3,0x0200(r16)			Else, store the unit's current spritesheet's SHP/SEQ pointer here and here.
0008364c: 0c02066a jal 0x000819a8			Get some Spritesheet data address
00083650: 02202021 addu r4,r17,r0
00083654: 02202021 addu r4,r17,r0
00083658: 0c020682 jal 0x00081a08			00081a08 - 00081a54
0008365c: ae0201f4 sw r2,0x01f4(r16)
00083660: 02002021 addu r4,r16,r0
00083664: 02602821 addu r5,r19,r0
00083668: 34060001 ori r6,r0,0x0001
0008366c: ae0201f8 sw r2,0x01f8(r16)
00083670: 0c020755 jal 0x00081d54			Weather/time of day/tile palette modification
00083674: a2120006 sb r18,0x0006(r16)
00083678: 08020dc7 j 0x0008371c
0008367c: 00000000 nop
00083680: 92030005 lbu r3,0x0005(r16)
00083684: 92040006 lbu r4,0x0006(r16)			load spritesheet ID
00083688: 00031100 sll r2,r3,0x04
0008368c: 00431023 subu r2,r2,r3
00083690: 00021100 sll r2,r2,0x04
00083694: 00431021 addu r2,r2,r3
00083698: 00021880 sll r3,r2,0x02
0008369c: 00621823 subu r3,r3,r2
000836a0: 000310c0 sll r2,r3,0x03
000836a4: 00621821 addu r3,r3,r2
000836a8: 00031840 sll r3,r3,0x01
000836ac: 3c01800c lui r1,0x800c
000836b0: 00230821 addu r1,r1,r3
000836b4: 90227ce9 lbu r2,0x7ce9(r1)			load current status' spritesheet ID
000836b8: 00000000 nop
000836bc: 1082001e beq r4,r2,0x00083738		if not changing status, end.
000836c0: 02002021 addu r4,r16,r0
000836c4: 92030005 lbu r3,0x0005(r16)			load ??
000836c8: 02602821 addu r5,r19,r0
000836cc: a600007a sh r0,0x007a(r16)			remove graphic Y offset if changing spritesheet.
000836d0: 00031100 sll r2,r3,0x04
000836d4: 00431023 subu r2,r2,r3
000836d8: 00021100 sll r2,r2,0x04
000836dc: 00431021 addu r2,r2,r3
000836e0: 00021880 sll r3,r2,0x02
000836e4: 00621823 subu r3,r3,r2
000836e8: 000310c0 sll r2,r3,0x03
000836ec: 00621821 addu r3,r3,r2
000836f0: 00031840 sll r3,r3,0x01
000836f4: 3c01800c lui r1,0x800c
000836f8: 00230821 addu r1,r1,r3
000836fc: 90277ce9 lbu r7,0x7ce9(r1)			current status' spritesheet IDs (for crystal/chicken/frog/treasure)
00083700: 8e0201fc lw r2,0x01fc(r16)
00083704: 8e030200 lw r3,0x0200(r16)
00083708: 34060001 ori r6,r0,0x0001
0008370c: ae0201f4 sw r2,0x01f4(r16)
00083710: ae0301f8 sw r3,0x01f8(r16)
00083714: 0c02091a jal 0x00082468			00082468 - 00082504
00083718: a2070006 sb r7,0x0006(r16)			store spritesheet ID
0008371c: 0c020bbb jal 0x00082eec			Set Animation Based On Unit Status
00083720: 02002021 addu r4,r16,r0
00083724: 02002021 addu r4,r16,r0
00083728: 948601e0 lhu r6,0x01e0(r4)
0008372c: 948701dc lhu r7,0x01dc(r4)
00083730: 0c021085 jal 0x00084214			Trap & Unit graphic information loading
00083734: 248501d8 addiu r5,r4,0x01d8
00083738: 8fbf0020 lw r31,0x0020(r29)
0008373c: 8fb3001c lw r19,0x001c(r29)
00083740: 8fb20018 lw r18,0x0018(r29)
00083744: 8fb10014 lw r17,0x0014(r29)
00083748: 8fb00010 lw r16,0x0010(r29)
0008374c: 27bd0028 addiu r29,r29,0x0028
00083750: 03e00008 jr r31
00083754: 00000000 nop