getBadgeLevel ; 3fdd
; outputs b = badgeLevel
ld hl,D857 ; JohtoBadges
ld b,02
call CountSetBits
ld e,a
ld d,00
ld hl,3FEF ; badgeLevelTable
add hl,de
ld a,(hl)
ld b,a
ret

badgeLevelTable ; 3fef
db 14
db 1E
db 26
db 2D
db 36
db 3C
db 3F
db 49
db 52
db 54
db 56
db 58
db 5A
db 5C
db 5E
db 60
db 64

RareCandy: ; 03:6f14
;(...)
call GetPartyParamLocation
jp rcpatch ; jump from ef24
jp nc,Functionee83 ; no effect if carry flag is clear
;(...)

rcpatch: ; 03:7a30
; cap at current badge level instead of at level 100
push bc
push af
push de
push hl
call 3FDD ; getBadgeLevel
pop hl
pop de
pop af
ld a,(hl)
cp b ; compare to b = badgeLevel instead of to 100
pop bc
jp 6F27

calcExpCap: ; 01:7600
; calculate maximum experience allowed given (hl)=species as input
; outputs hQuotient = maximum experience allowed
ld d,(CF60) ; CurSpecies
push de ; save (CF60) to restore CurSpecies later
ld a,(hl)
ld (CF60),a ; load species of Pokemon we're dealing with into CurSpecies
call GetBaseData ; load base data of Pokemon identified by CurSpecies into RAM, including growth rate
; Growth Rates:
; 0: exp = level^3
; 4: exp = level^3 * 4 / 5 (fast)
; 5: exp = level^3 * 5 / 4 (slow)
call 3FDD ; getBadgeLevel
xor a
ld (FF00+B4),a ; hMultiplicand
ld (FF00+B5),a ; hMultiplicand
ld a,b ; badgeLevel
ld (FF00+B6),a ; hMultiplicand
ld (FF00+B7),a ; hMultiplier
push af
call Multiply ; 3119
pop af
ld (FF00+B7),a
call Multiply ; we now have badgeLevel^3 at FFB3-FFB6, but FFB3 is never higher than 00
ld a,(D24C) ; BaseGrowthRate
and a
jr z,finish ; if growth rate is 0 then exp = level^3
cp 5
jr z,slowExpGroup
fastExpGroup: ; multiply by 4 and divide by 5
ld a,4
ld (FF00+B7),a
call Multiply ; again, result is at FFB3-FFB6
ld a,5
ld b,4 ; dividend is 4 bytes long (or 3)
ld (FF00+B7),a ; hDivisor
call Divide ; hDividend is FFB3-FFB6
jr, finish
slowExpGroup: ; multiply by 5 and divide by 4
ld a,5
ld (FF00+B7),a
call Multiply ; again, result is at FFB3-FFB6
ld a,4
ld b,4 ; dividend is 4 bytes long (or 3)
ld (FF00+B7),a ; hDivisor
call Divide ; hDividend is FFB3-FFB6
finish:
pop de ; restore CurSpecies
ld (CF60),d ; CurSpecies
call GetBaseData ; restore base data of original Pokemon
ret

DayCareMan:
;(...)
jr z,72A4
jp dcmpatch ; jump from 7289
nop
nop
nop
nop
nop
;(...)

dcmpatch: ; 01:7500
; cap at current badge level instead of at level 100
push bc
push af
push de
push hl
ld hl,DF0C ; species
call calcExpCap ; output hQuotient = maximum experience allowed, given (hl)=species as input
ld a,(FF00+B6) ; cap LSB
ld b,(DF16) ; current exp LSB
cp b
jr z,checkMiddleByte
pop hl
pop de
pop af
pop bc
jp 728E ; if they are not equal, cap hasn't been reached
checkMiddleByte:
ld a,(FF00+B5)
ld b,(DF15)
cp b
jr z,checkMSB
pop hl
pop de
pop af
pop bc
jp 728E ; if they are not equal, cap hasn't been reached
ld a,(FF00+B4)
ld b,(DF14)
cp b
jr z,capReached ; if every byte is equal, cap has been reached, so stop experience growth
pop hl
pop de
pop af
pop bc
jp 728E ; if they are not equal, cap hasn't been reached
capReached:
pop hl
pop de
pop af
pop bc
jp 72A4

DayCareLady:
;(...)
jr z,72C6
jp dclpatch ; jump from 72ab
nop
nop
nop
nop
nop
;(...)

dclpatch: 01:7580
; cap at current badge level instead of at level 100
push bc
push af
push de
push hl
ld hl,DF45 ; species
call calcExpCap ; output hQuotient = maximum experience allowed, given (hl)=species as input
ld a,(FF00+B6) ; cap LSB
ld b,(DF4F) ; current exp LSB
cp b
jr z,checkMiddleByte
pop hl
pop de
pop af
pop bc
jp 72B0 ; if they are not equal, cap hasn't been reached
checkMiddleByte:
ld a,(FF00+B5)
ld b,(DF4E)
cp b
jr z,checkMSB
pop hl
pop de
pop af
pop bc
jp 72B0 ; if they are not equal, cap hasn't been reached
ld a,(FF00+B4)
ld b,(DF4D)
cp b
jr z,capReached ; if every byte is equal, cap has been reached, so stop experience growth
pop hl
pop de
pop af
pop bc
jp 72B0 ; if they are not equal, cap hasn't been reached
capReached:
pop hl
pop de
pop af
pop bc
jp 72C6

getExpCapInBattle: ; get maximum experience allowed based on current badge level and Pokemon's growth rate
; outputs hQuotient = maximum experience allowed
push af
push bc
push de
push hl
ld a,(D109) ; CurPartyMon
ld hl,(DCAF); PartyMon1Species - (PartyMonNSpecies - PartyMonN-1Species) = PartyMon1Species - 30
ld bc,0030 ; PartyMonNSpecies - PartyMonN-1Species
inc a
loop: ; make hl point to species of current party Pokemon
add hl,bc
dec a
jr nz,loop
call calcExpCap ; 01:7600
; calculate maximum experience allowed given (hl)=species as input
pop hl
pop de
pop bc
pop af
ret

getFinalExperienceInBattle: ; calculate the experience that the Pokemon is going to receive
push af
push bc
push de
push hl
ld a,(D109) ; CurPartyMon
ld hl,(DCB9); PartyMon1Exp - (PartyMonNExp - PartyMonN-1Exp) = PartyMon1Exp - 30
ld bc,0030 ; PartyMonNExp - PartyMonN-1Exp
inc a
loop: ; make hl point to experience LSB of current party Pokemon
add hl,bc
dec a
jr nz,loop
ld e,(hl)
dec hl
ld d,(hl)
dec hl
ld h,(hl) ; hde = Pokemon's current experience
callba getExpCapInBattle ; hQuotient = maximum experience allowed
ld a,(FF00+B6)
sub e
ld (FF00+B6),a
ld a,(FF00+B5)
sbc d
ld (FF00+B5),a
ld a,(FF00+B4)
sbc h
ld (FF00+B4),a ; Cap - Current = Maximum experience the Pokemon can gain not to surpass the cap
ld a,(FF00+B5)
ld b,(D086) ; exp about to gain MSB
cp b
jr z, checkLSB
jr nc, finish ; exp about to gain is not higher than cap
ld (D086),a ; else, overwrite exp about to win with cap
ld a,(FF00+B6)
ld (D087),a
checkLSB:
ld a,(FF00+B6)
ld b,(D087) ; exp about to gain LSB
cp b
jr nc, finish ; exp about to gain is not higher than cap
ld (D087),a ; else, overwrite exp about to win with cap
finish:
pop hl
pop de
pop bc
pop af
ld a,(d109) ; original 0F:6f02
jp 6F05

exppatch:
; at this point D086-D087 contains experience the Pokemon is about to gain
jp getFinalExperience ; jump from 0F:6f02
;(...)