Notable Breakpoints

This page contains RAM addresses to various interesting and useful processes of GBA and DS Pokemon games.

Breakpoints can be set at these addresses.

Inspiration

This page is inspired by tsanth's thread with the same name on GameFAQs: [1]

Pokemon DPP (U)

DP RAM Address	Pl RAM Address	Description	Discovered by
02000C54	02000C88	Main()	Bond697
02000FB0	02001034	Begin Seed Calculation Routine	mingot, arcee
0201B9E0	0201D2DC	Set PRNG seed	mingot, arcee
0201B9EC	0201D2E8	PRNG	loadingNOW, tsanth
0201BA10	0201D30C	Alternate RNG used in some cases: Examples, PID generation for mystery gift pokemon, recalculating a PID after a failed shiny check, number which determines swarm pokemon and great marsh pokemon	SCV
0201BA1C	0201D318	Set IRNG Seed	mingot, arcee
02038B70	0203E778	Script Handler	loadingNOW
	0203E7D2	Loads address for a command then branches to that address	SCV
02042FB4	0204BAFC	ARNG call for PID of Wondercard pokemon	SCV, arcee
02042FBA	0204BB02	Loads PID from wondercard to r0	SCV, arcee
02042FC8	0204BB10	First Shiny Check call during the generation of some wondercard pokemon	SCV, arcee
02042FD0	0204BB18	Beginning of loop that makes sure you do not get a shiny wondercard pokemon (in some cases)	SCV, arcee
0204305E	0204BBA6	PRNG call for first set of Wondercard pokemon IVs	tsanth, arcee
0204309C	0204BBE4	PRNG call for second set of Wondercard pokemon IVs	tsanth, arcee
0205DED4		Create chain set (not sure about address in tsanth's thread it said 205DED	tsanth, loadingNOW
0205DF42		End of Create chain set routine	tsanth, loadingNOW
0205E40C	02069B00	Pokeradar Routine	loadingNOW, tsanth, arcee
02068AAC	02075E38	Shiny Check, used to decide what sprite to show for a pokemon and to make sure dynamic PID mystery gift pokemon are not shiny as well as preventing manaphy from hatching shiny in some cases.	SCV, arcee
	02075C86	128 step RNG advancement	arcee
	0207760E	Poketch check @ daycare screen	arcee
0206A90C	02078780	Begin Calculation of Pokemon ID for alternate forms.	SCV, arcee
020EBC80	020E1F6C	Division routine; R0= R0 / R1, R1=R0%R1	tsanth, SCV
	020EAC58	Pointer to Begin Routine for Script Command 0000	SCV
	020EB974	Pointer to Begin Routine for Script Command 0347	SCV
021C4D48	021BFB14	PRNG State	Kazo
021C4D4C	021BFB18	Mersenne Twister Lookup Table	Kazo
021F4DA8		Beginning of Honey Tree Routine	SCV
021F4EE4		Determines a value from 0-3 to use to determine which list will be used and how the shake value is calculated. If 0, slathering fails and not pokemon will show up.	SCV
021F4F44		Determines a number from 0-5 that represents which pokemon will be encountered in a honey tree.	SCV
021F4F98		Determines which list will be used by (value determined by 021F4EE4) - 1 (its not done this way, but is equivalent)	SCV
021F4FAC		Determines a number from 0-3 that represents how much a Honey Tree will shake	SCV
021F5138	021EFF4C	Returns 1 if the current tree being slathered is a Munchlax Tree and 0 otherwise.	SCV
02211E60		Set GRNG seed	magical
02211E70		GRNG	magical
0223BA10		Movement Handler Start	tsanth
0223BA46		"Am I on grass?" check	tsanth
0223BAD4		Wild Encounter Check	tsanth
0223BB2E		Pair-battle (NPC partner) check	tsanth
0223BD1C		Movement Handler END	tsanth
0223C1EE	022377A2	Pokeball catching routine	tsanth, arcee
0223C5B8		Start of Encounter Table Lookup Handler	mingot
0223C66A		Start of Water (Sweet Scent/Surfing) Encounter Table Lookup Handler	mingot
0223C6A0		Start of Water (Fishing) Encounter Table Lookup Handler. There are 3 branches for each of the rods in this routine with different results for old and good/super.	mingot
	022417F4	Encounter- terrain check	arcee
	02241848	Encounter- motion mod	arcee
	022479E6	Call to get ID routine (result in r0)	SCV
	0224E920	Start of Frozen Handler	SCV

0224190A - ESV calc 02241B28 - nature calc (probably)

Pokémon HGSS (U)

RAM Address	Description	Discovered by
02000CA4	Main()	Bond697
0201FD44	PRNG advancement routine	Bond697
02061E2A	NPC movement	arcee
020F2998	Signed divmod()	?
020F2BA4	Unsigned divmod()	?
0210F6CC	Mersenne Twister lookup table counter	Bond697
021D15AC	Mersenne Twister lookup table	Kazo
021D15A8	PRNG State	Kazo
022440A0	Pickup / Honey Gather handler	magical
02246B24	Start of Water (Fishing) Encounter Table Lookup Handler [2]	mingot
02246FCC	Fishing decision	arcee
02247228	Pokéball catching routine	magical
022475F2	Partial encounter calc- movement modifier	arcee
0224767A	Partial encounter calc- ability/item modifier	arcee
02247698	Encounter slots	arcee
02247720	Start of Water (Sweet Scent/Surfing) Encounter Table Lookup Handler [3]	mingot
022483C4	Partial encounter calc- roamer modifier	arcee

Pokémon BW (U)

RAM Address	Description	Discovered by
01FF8000	ITCM start	Bond697
01FF80F0	ARM9 IRQ Handler	Bond697
02005124	main() function- infinite main/busy loop that runs the game starts at 02005166	Bond697
020056D0	Set up both main RNGs for use	Bond697
020056EC	PRNG advancement routine 1	Bond697
02005728	PRNG advancement routine 2	Bond697
02017EF4	Shiny check routine	Bond697
02018746	PID type decision	Bond697
02018788	Shiny prevention routine	Bond697
02019A6C	PKM + RAM encryption	Bond697
02035F50	New (NDS-only) input handler	Bond697
02035F94	GBA-equivalent input handler	Bond697
0203AE38	C-Gear startup RNG interaction(reseed MT, encrypt, etc)	Bond697
0203EFE0	memcmp()- memory compare: 2 pointers and length of comparison(in bytes))	Bond697
0203F04C	Set init MT seed (seed = init rng >> 32)	Bond697
0203F078	ARNG(same as gen 4)- build initial MT seed table	Bond697
0203F0C0	Mersenne Twister seed table builder	Bond697
0203F270	Initial Seed Creation Routine	OmegaDonut
0203F374	.sav encryption	Bond697
0207FD4C	VRAM bank control handler	Bond697
02082D5C	memcpy32()- accepts pointer to data start, pointer to copy start, and a length in bytes to copy	Bond697
02085D54	DSi Detection Routine	chiizu
02088E74	Convert dec -> hex(mainly for RTC data, but usable for anything)	Bond697
02088A98	Date/time switch statement- used to grab pieces of the date and time and convert them to hex	Bond697
0209C0C4	Signed divmod- r0/r1, result in r0; r0%r1, result in r1	Bond697
0209C2C8	Unsigned divmod- r0/r1, result in r0; r0%r1, result in r1	Bond697
020946AC	ARNG2(unused)- not a breakpoint, but notable nonetheless..	Bond697
020AA1C4	RNG state pointer	Bond697
02146A18	Mersenne Twister seed table pointer	Bond697
02193914	White Forest Trainer # Counter- returns # of trainers in White Forest	Bond697
021A9DB2	0x80000000 OR PID decision routine	Bond697
021A9DF8	Fishing decision	arcee
021AA44C	White Forest Battle Decision Routine- return 0 if no battle, 1 if there's a battle	Bond697
021BFBD0	Opponent accuracy	arcee
021C0A6C	Battle routine(setup)	Bond697
021C2466	Status infliction	arcee
021C6C18	Damage formula	arcee, Bond697
021F6388	Battle PRNG State	Kaphotics
02215374	Mersenne Twister Lookup Table	Bond697
02215D34	Mersenne Twister Lookup Table Counter	Bond697
02216244	PRNG State	Bond697
0221BBD0	Start of save data in RAM(when saving, all relevant data is written here, then cart RAM, then .sav)	Bond697
02250030	Encounter slots in RAM	Bond697
02257030	Step Counter	Bond697
02257034	Shaking Patch Step Counter	Bond697
0226DC5A	Move Consecutive Use Counter (Wild Battle)	Kaphotics
0226DC66	Protect Consecutive Turn Counter (Wild Battle)	Kaphotics
0226E70E	Move Consecutive Use Counter (Trainer Battle)	Kaphotics
0226E71A	Protect Consecutive Turn Counter (Trainer Battle)	Kaphotics
02274302	Move Decision Dump (Wild Battle)	Kaphotics
022BC734	Are there trainers in White Forest? (bool)	Bond697
0233F004	Egg step counter	ToastPlusOne
023FFC3C	Delay	OmegaDonut
023FFDE8	Date	OmegaDonut
02FE0000	DTCM start	Bond697
02FE3780	Main(user mode) stack start	Bond697
037FBCEC	ARM7 IRQ Handler	Bond697

(All offsets are White offsets. Black offsets are White offset minus 0x20)

Pokémon BW (J)

RAM Address	Description	Discovered by
02005124	Main()	Bond697
022151D4	Mersenne Twister Lookup Table	OmegaDonut
02215B94	Mersenne Twister Lookup Table Counter	Kaphotics
022160A8	PRNG State	Kazo
023FFC3C	Delay	OmegaDonut
023FFDE8	Date	OmegaDonut

(All offsets are White offsets. Black offsets are White offset minus 0x20)

Pokémon Emerald (J)

RAM Address	Description	Discovered by
02024664	Frame Counter	Kaphotics
03005AE0	PRNG State	Kaphotics
0806F050	PRNG Advancement Routine	Kaphotics
080003A4	Main loop	Bond697
080005E4	Keypress handler	Bond697
08000758	VBlank interrupt	Bond697
080B413A	Feebas setup routine on finding a Feebas tile	Bond697
08296518	Modulus routine- r0 % r1, return result in r0	Bond697
08000248	IRQ setup	Bond697

Pokémon Emerald (U)

RAM Address	Description	Discovered by
02020000	Timer1 storage on TID creation	Bond697
020249C0	Frame counter	mingot
030022E0	Timer PRNG Initial State (Egg PIDs)	Kaphotics
03002750	IRQ Handler (user mode)	Bond697
03005D80	PRNG State	mingot
03005D84	Timer RNG Current Seed (Egg PIDs)	Kaphotics
08000248	IRQ setup	Bond697
080003A4	Main loop	Bond697
080005E4	Keypress handler	Bond697
08000758	VBlank interrupt callback	Bond697
08000988	Memblock header setup	Bond697
08000B1C	Define memblock	Bond697
08000B38	Declare memblock(malloc()?)	Bond697
0806F5CC	PRNG Advancement Routine	mingot
080B49E2	Feebas setup routine on finding a Feebas tile	Bond697
	Start Method H
080B5144	Battle Test	Bond697
080B4AC8	Encounter Slot	Bond697
080B4C74	Set level	Bond697
080B4E2A	Sync (bool)	Bond697
080B4E4C	Nature Setup/Decision (skip if sync() == TRUE)	Bond697
08067E96	PKM Building Routine (test temp PIDs, make IVs on success)	Bond697
	End Method H
08067BF8	Roamer creation start	Bond697
082E7BE0	Modulus routine- r0 % r1, return result in r0	Bond697

Pokémon Ruby / Sapphire (U)

RAM Address	Description	Discovered by
02024D1C	Quick Claw Determination	FractalFusion
020287E4	Egg Creation Step Counter	Kaphotics
03004818	PRNG State	Multiple
0800010C	IRQ setup/handler	Bond697
0800024C	Main loop	Bond697
08000428	Keypress handler	Bond697
0803AADC	PID creation routine	Bond697
08084AA6	Feebas decision	Bond697
081E0770	Interrupts/SWIs	Bond697
080003E4	Initial seed creation	Bond697

Pokémon FireRed / LeafGreen (U)

RAM Address	Description	Discovered by
02020000	Timer1 storage on initial seed creation	flovv, Bond697
03005000	PRNG State	Bond697
08000558	Turn on Timer1 @ TM1CNT_H = 0x80	Bond697
08000564	Grab and return the value of Timer1 for use in seeding	Bond697
08000570	Turn off Timer1 @ TM1CNT_H = 0x0 and store the grabbed value to 0x02020000	Bond697
08044EC8	PRNG Advancement Routine	Bond697