[FR] Weather Rocks

[Aryan 10]

Weather Rocks

The following routines hijack the setweather commands and make them check your held item's effect byte.

First, insert this routine, and keep note of where you inserted this. This returns the held item effect byte to r0:
.text
.align 2
.thumb
.thumb_func
.global itemcheck

main:
ldr r0, .items
ldr r1, .struct
ldr r2, .bank
ldrb r2, [r2]
mov r3, #0x58
mul r2, r3
add r1, r2
add r1, #0x2E
ldrh r1, [r1]
mov r2, #0x2C
mul r1, r2
add r0, r1
ldrb r0, [r0, #0x12]
bx lr

.align 2
.items: .word 0x083DB028
.struct: .word 0x02023BE4
.bank: .word 0x02023D6B


Next, insert these routines:

Smooth Rock:

SPOILER: Click to show

.text
.align 2
.thumb
.thumb_func
.global smoothrock

main:
mov r0, #0x3
strb r0, [r1, #0x5]
push {r0-r3}
bl itemcheck
cmp r0, #0x48 @change this number to your desired held item effect number.
bne original
pop {r0-r3}
ldr r0, .weatherturns
mov r1, #0x8
strb r1, [r0, #0x0]
b return

itemcheck:
ldr r0, .routine
bx r0

original:
pop {r0-r3}
ldr r0, .weatherturns
mov r1, #0x5
strb r1, [r0, #0x0]

return:
ldr r0, .return
bx r0

.align 2
.routine: .word 0x08XXXXXX
.weatherturns: .word 0x02023F48
.return: .word 0x08028CD7

@ insert 01 48 00 47 C0 46 XX XX XX 08 at 08028CCA

Damp Rock:

SPOILER: Click to show

.text
.align 2
.thumb
.thumb_func
.global damprock

main:
ldr r0, .address
strb r1, [r0, #0x5]
push {r0-r3}
bl itemcheck
cmp r0, #0x49 @change this number to your desired held item effect number.
bne original
pop {r0-r3}
ldr r0, .weatherturns
mov r1, #0x8
strb r1, [r0, #0x0]
b return

itemcheck:
ldr r0, .routine
bx r0

original:
pop {r0-r3}
ldr r0, .weatherturns
mov r1, #0x5
strb r1, [r0, #0x0]

return:
ldr r0, .return
bx r0

.align 2
.address: .word 0x02023E82
.routine: .word 0x08XXXXXX
.weatherturns: .word 0x02023F48
.return: .word 0x080274E5

@ insert 00 48 00 47 XX XX XX 08 at 080274D8

Heat Rock:

SPOILER: Click to show

.text
.align 2
.thumb
.thumb_func
.global heatrock

main:
ldr r1, .address
mov r0, #0x4
strb r0, [r1, #0x5]
push {r0-r3}
bl itemcheck
cmp r0, #0x4A @change this number to your desired held item effect number.
bne original
pop {r0-r3}
ldr r0, .weatherturns
mov r1, #0x8
strb r1, [r0, #0x0]
b return

itemcheck:
ldr r0, .routine
bx r0

original:
pop {r0-r3}
ldr r0, .weatherturns
mov r1, #0x5
strb r1, [r0, #0x0]

return:
ldr r0, .return
bx r0

.align 2
.address: .word 0x02023E82
.routine: .word 0x08XXXXXX
.weatherturns: .word 0x02023F48
.return: .word 0x0802B313

@ insert 00 49 08 47 XX XX XX 08 at 0802B304

Icy Rock:

SPOILER: Click to show

.text
.align 2
.thumb
.thumb_func
.global icyrock

main:
mov r1, #0x5
strb r1, [r0, #0x5]
push {r0-r3}
bl itemcheck
cmp r0, #0x4B @change this number to your desired held item effect number.
bne original
pop {r0-r3}
ldr r0, .weatherturns
mov r1, #0x8
strb r1, [r0, #0x0]
b return

itemcheck:
ldr r0, .routine
bx r0

original:
pop {r0-r3}
ldr r0, .weatherturns
mov r1, #0x5
strb r1, [r0, #0x0]

return:
ldr r0, .return
bx r0

.align 2
.routine: .word 0x08XXXXXX
.weatherturns: .word 0x02023F48
.return: .word 0x0802BCB3

@ insert 00 49 08 47 XX XX XX 08 at 0802BCA8

In every rock routine
.routine: .word 0x08XXXXXX
Change the XXXXXX to the address you inserted your first routine (the item check routine) at.

Credit goes to HidoRanBlaze!