[Feature Request] Lottery RNG for DPPt/HGSS

[greenDarkness]

For HGSS the beginning lottery number can be obtained by taking the 16 bit High from the 4th frame of a seed, and then converting it from hex to decimal.

For DPPt the beginning lottery number can be obtained by taking the 16 bit High from the 2nd frame of a seed, and then converting it from hex to decimal.

Would it be possible to search through the 16 bit High of the 2nd or the 4th frame of a seed to see if the number produced matched a possible TID?

[Admiral-Fish]

Could you link where you found this, unless you discovered it through testing. I assume it uses the initial seed that is also used to create the TID/SID.

[greenDarkness]

Deece/Bruceman from Discord was who I got the info from; apparently this is common knowledge in the speedrunning community, because there is actually a tool called RaikouSearcher by mkdasher that lets you look for Cyndaquil/Raikou spreads that has a seed which can win the masterball from your OT or Kenya the Spearow. The tool is a little awkward to use due to the speed running jargon, and it doesn't work for Platinum- these are the primary reasons why I suggested the addition to PokeFinder.
And I also believe that is the case, but I'm not certain. I'm gonna try to do some testing later.
https://www.speedrun.com/pkmnhgss/resources

[Admiral-Fish]

Been a while since I have looked at this. Did you have some kind of vision for what the GUI would look like?

I am not entirely opposed to adding this, I just don't think I know enough to see what the end goal would look like.

[greenDarkness]

Goal for this project:
Create a GUI that uses a provided TID and checks it against a range of seeds using Advance 1 or Advance 3 for DPPt and HGSS respectively.

My vision of the GUI is as follows:
Under Gen 4 tools there would be an additional option called "Lottery".
When "Lottery" is clicked a similar window to "Gen 4 TID/SID" would be produced- except it one only have 1 search field instead of 3.
For the title you could just list it as "Seed Finder", and the below that it would have fields for DPPt/HGSS, TID, Year, Min Delay, Max Delay, and perhaps even the infinite search. After searching the user would be provided with a list of seeds containing numbers that match the provided TID on Advance 1/3.

[aluminiumAKA]

I am very much looking forward to adding this feature. It is very useful when I do RTA. Please.

[GimmyTomas]

I have details on how the Lottery RNG advances after the first day (example: https://youtu.be/bivayAXdpS0), however I still don't understand how and when seemingly "old" (like ≥months, or so) savefiles seem to re-seed the Lottery RNG at some point. Don't know if you want to add this stuff too.

[HappyLappy1]

This is known: creating a "group" will set the group seed (that controls lottery) to the current MT state. Joining a group copies the seed of the current group leader to yours. Basically, never join or create a group, and it's based on the seed at save initialization. Also, a modified LCRNG (same mult, add of 0x3039) is used on day 2+ group seed states as a sort of mask for the final lottery number.

[GimmyTomas]

I am aware of groups, but I am pretty sure that the reseeding happened in savefiles which never joined or created one. I don't have an example right now, but I will post here if I find one.

The phenomenon is visibile on emulator too (DesMuMe with a lua script to check the LID), by the way, under conditions which I haven't fully understood, but seemed to do with changing date enough times.

[HappyLappy1]

Interesting. I have further questions about this, please reach out to me on discord (happylappy#5231) about this. Definitely want to get a better understanding of this, since it jeopardizes the effectiveness of my group seed SID finding tool.