Glitch City Laboratories Archives

Then there's the perhaps more user friendly but somewhat less complete RAM map at https://datacrystal.romhacking.net/wiki/Pokémon_Red/Blue:RAM_map. It's for Red and Blue, though, but it works for Yellow because Yellow RAM addresses are exactly 1 less than those in Red/Blue.

I noticed there are different ACEs but the order of items are the same. At least I'm using Pidgey 233 current HP, Paras, Onix, Tentacool and Kangaskhan in my party in that order. In Yellow, i had to fullfill a box with slowpokes voltorb, jolteon and geodudes to manipulate the DVs of the first pokemon of my party, i'm wondering if there will be a simpler ACE in Yellow with ws&m.

There are other somewhat easier ones in my opinion. Rather than the filled box, you could use the other one in the OP, which is only 10 Pokémon (most of which aren't too hard to catch).

You can also use 4F, which isn't awful. https://forums.glitchcity.info/index.php?topic=8056.0 . (Note below that I think Krys got an address wrong here).

Another possible bootstrap for 4F would be this one I came up with a few nights ago, which I think is a lot better because it allows you to get everything required without any glitches (because I don't think it's possible to get a Nidorina unevolved from a NidoranF without Ditto glitch):

Put in daycare a Hitmonlee with these moves (you can take it out afterward if you want):
* Any move.
* Any move that won't crash the game when used on its own (I use Meditate for this).
* Double Kick.
* Mega Kick.

Then you just need to box:
* Any pokemon with current pp as follows:
1) Any PP
2) 33
3) 33 (you can do this method in Red/Blue too, but if you do you just need to change this to 34)
4) 19 with 3 PP Up used
* Clefairy (or anything else that won't crash the game or alter h or l registers) at 233 hp
* Anything
* Tentacool
* Parasect

Unless both BGB and the disassembly are giving me the wrong values (and believe me, I've double-checked myself on this more than 20 times to make absolutely sure), the value at FA64 is *not* the catch rate of the Daycared Pokémon, it's the secondary type of the Daycared Pokémon. Since Krys was using Nidorinas, the opcode executed was "inc bc" because Nidorina has type POISON POISON, so DA64=03. This meant that nothing of interest happened and the next byte was executed, which was the catch rate, which is why assuming it jumped to the catch rate didn't have any harmful effects. I use a Hitmonlee because it's convenient and learns the moves we need pretty easily, but I think a ton more Pokémon will work as a result, because if you use Fighting type, that's 01, which means that it eats the next two bytes, the catch rate and the first move. (And other types presumably could be used for other effects. I'm not a fan of the type constants, so I'm not looking any further than this.)

So here's the ASM for this:
WRA1:DA64: 01 2D 1B ld bc,$1B2D
WRA1:DA67: 60 ld h,b
WRA1:DA68: 24 inc h
WRA1:DA69: 18 19 jr DA83
WRA1:DA83: 18 2E jr DAB3
WRA1:DAB3: 21 21 D3 ld hl,D321
WRA1:DAB6: 04 inc b
WRA1:DAB7: 00 nop
WRA1:DAB8: E9 jp [hl]

I mean unless BGB's debugger is giving me the wrong information and I'm counting in the disassembly wrong. But it works when I do it. And the breakpoints I'm setting claim that the things being executed are the things I'm saying are being executed.

Since -g m jumps to da47, the current number of safari balls, it could sometimes break in the safari zone. Lucky's setup is more prone to this since useful code begins at da48 (wDaycareInUse) so some opcodes will interfere with that. Azarokkusu's setup begins useful code a bit later with the rest being safe filler, so it's a little more robust and in fact all legitimate values of safari balls (i.e. <= 30 (decimal)) don't interfere with it jumping to the 3rd bag item; even jr only ends up having an operand of 0 or 1.

However a few values should be taken note of: If you have 2 or 18 safari balls, SRAM will be opened since these opcodes are ld (bc), a and ld (de), a respectively, and bc and de both happen to point to the 0x00??, and a happens to by 0x6A, making rst 38 crashes more deadly, and if you have 8 safari balls you'll end up writing 2 junk bytes (the stack pointer) to the start of VRAM - possibly causing a slight graphical glitch but nothing major.

Also if your item setup depends on registers other than HL (which are rare), just don't use it in the safari zone at all; most ball amounts will break something.

The only requirement for the game to consider a Pokémon "yours" is that your OT and OTID match

Typing in "TRAINER(end)" during the New Game sequence will not give you the same OT as the owners of in-game trades, even if it looks the same when printed to the screen. It's like how choosing the preset name "RED" isn't the same as typing in "R", "E", "D", and then the end marker. The only way I can think of to change your name to 5D 50 50 50 50 50 50 50 50 50 50 would be through ACE.