Downloaded Battle Institute scenarios?

[SwagKey]

I don't know where else to put this, but I think it's worth looking over.

So I got back to playing Gen 5 again when I came across the Battle Institute building. Similar to the PWT, there's an option to allow you to download scenarios and battle against them...except I don't recall ANY being distributed during the game's relevance. From what I heard only one of these ever got released, but other than that I've ran into nothing else. I know Gen 6 had the same building so I'm not sure if the supposed scenario was for those games and/or Japan only.

If these generations truly had no Battle Institute scenarios distributed at all then maybe someone could look into it and possibly re-enable the features through something custom like the PWT download tournaments. Also, if one single scenario did get distributed, to my knowledge it hasn't been preserved yet. Either way, for such a forgettable feature of these generations I think someone should look into this.

[Guest]

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Edited December 22, 2019 by Guest

[Danius88]

I couldn't find any way to re-create a custom Battle Institute test, but I was able to edit a DLC test record! In B2W2, the Battle Institute records are stored in the block 0x23700 - 0x237A7.

                                                                   

Edited January 19, 2022 by Danius88

[Kaphotics]

My recollection is that there were never any Battle Tests distributed during the lifetime of the NDS online services, so this content was never officially available for download & documentation.

As the years have passed, our understanding of the Gen5 save file structures has allowed us to identify the region of save file data that *would* have stored the downloaded battle test data, were it ever made available officially. However, since we don't have any of the official data, we can't really guess the size & layout of the data that needs to be there to get the game to recognize it.

With the power of disassembling the game code, we can see that the region of data is 0x5C8 bytes long, and the validation function checks for a magic number and checksum over the region being valid. When it's valid, you get....

==

The latest commits of PKHeX allow for importing/exporting of this data region. This "DLC Battle Test" structure is undocumented. Fuzzing the rest of the data to values 01-04 gets me into a battle! Guess it has to be analyzed in more detail, but hey, at least we can trigger the in-game loading of injected data!

Attached a randomly-fuzzed download test that doesn't crash, which can be imported with the latest development build of PKHeX. Rather than disassembling the game code that interprets the block, we can just observe the results and see what offsets determine what, to get the overall structure documented

Battle Test.bt5