Sabresite

@ajxpk How are you able to reconstruct 7 of them without the original trash bytes? Also there is still one remaining question. What was in the player's party before any trades were done. 1, 5, 6 mews? Another pokemon?

I haven't had time to look at those saves to see if they match what I was given. Ajxpk is right about the trash bytes. The original trash bytes are generated from the actual event process. I wonder if that process was modified (Like a program that has a generate 1, 5, 10, 100 option) to account for the other 4 mews in the 5-mew block. As for the trash bytes, I haven't had time to put together a pattern search algorithm. Although since it is just one byte, and there are several variables that could account for trash bytes, it is hard to start. if I had more information about how trash bytes are normally generated in 3rd gen, including (or not) event process, then that would help tremendously. Unfortunately it could be something as simple as, what was in memory at that time, before the generation. Also if 3rd gen has dynamic memory offsets (Emerald had that too, did FR?), that could account for the trash bytes being different too.

The only saving grace is that the original mystery mews had 1 unique trash byte. With enough time and luck I could probably figure out the pattern for the extrapolated mews also. I don't think it is worth it, and it won't stop people from selling clones or faked mystry mew carts. I know the original download is gone, so I'll find my copy and upload if needed again.

@suloku - It looks like they all follow that pattern of trash bytes. There are overlaps too. Not sure what generates 3g trash bytes as I haven't done the research. Those trash bytes also get obliterated at pal park, so they are not useful for legality checking beyond 3g itself.

Thank you @evandixon and @peer for getting us back online! You guys did a great job.

I haven't looked at your files, but I have a complete collection of GCEA (Japan) and WISH (shiny hatched eggs, including Chansey). Let me know if you need any of them!

Thank you THO, I think that should work?

Every combination that comes from one of the valid seeds, I think it was like 0x0 -> 0xFF (or might have been lower, I forget).

There are only 256 total possibilities for berry zigzagoon since the seed is contrived.

Holy shit that is alot of missing pokemon! Is there any way to at least acquire the pokemon themselves? And thank you regarding my avatar!

Are we missing the pokemon and the wondercard, or just the wondercard? Also, we do have a running list of missing pokemon/wondercards?

Will anyone be able to get these? They will definitely be two different ones because of language I assume?

Was the cartridge for this ever dumped? I am not suggesting to distribute it, but I would like to see if its the same as the other cartridges I have, and if there is anything we can learn from it. Thanks!

If anyone wants the original 420 3gpkm files, I'll try and find some time to extract them. Keep in mind that they will not look like they were traded.

I always wondered how the batch seeds were created. They are obviously the output of another algorithm or random generator. I remember looking into it and not finding much, but I didn't have a program with all 8 algorithms on it

Nice!!

The algorithm used is the same as any other event pokemon. Specifically though, there are 5 mews generated in order from each of those batch seeds. That means after the first mew is created, the next one uses the next call in the PRNG. I'll leave the rest for you guys to figure out! A good shortcut for anyone trying to replace pokecheck or my own legality checks would be to simply have all 420 of the PID/IV combinations.

I think they are 4th gen if I remember correctly.

As an FYI, none of the saved games sent to me were "unused" to the point where the trainer still had their 6 pokemon used for battling intact. It is most likely that 5 mews were generated as battle pokemon for the trainer. Unfortunately I believe those will be lost to time!

I have uploaded all of the Mews from this event here: https://projectpokemon.org/forums/showthread.php?48622-Toys-R-Us-Mews&p=214840

Hey everyone. Attached are the Mews everyone is asking for. Here are the seeds used to generate each batch: 0x0000E6CC, 0x00005841, 0x000020BF, 0x0000E95D, 0x000034F3, 0x00005327, 0x0000C2D4, 0x0000D1E4, 0x00005A60, 0x000078D2, 0x00009D9C, 0x0000643F, 0x000046CE, 0x00001C09, 0x0000C385, 0x0000FE9D, 0x0000302D, 0x0000A443, 0x0000EE7F, 0x000050AB, 0x000095A0, 0x00004B63, 0x00007667, 0x00009C40, 0x00000C13, 0x00008A92, 0x00009E86, 0x0000C953, 0x0000508E, 0x00009690, 0x000067A3, 0x0000C6CE, 0x0000E62C, 0x0000CD96, 0x0000AFFB, 0x000056CC, 0x00006E62, 0x0000B1F2, 0x00000652, 0x0000CC43, 0x000093D0, 0x0000A8AC, 0x0000EE9F, 0x00008B48, 0x00000EEE, 0x0000B831, 0x00005BC1, 0x0000941D, 0x0000CD47, 0x0000EBB2, 0x00004A0D, 0x00009C37, 0x0000F0E4, 0x00001614, 0x0000E90A, 0x0000BE96, 0x00002389, 0x0000AC08, 0x000056BA, 0x00005240, 0x00006E06, 0x000045F3, 0x00006944, 0x0000C962, 0x0000DFED, 0x00002939, 0x0000EFC8, 0x00006457, 0x00009DE4, 0x00004C79, 0x000013C9, 0x0000A153, 0x0000E991, 0x000077EF, 0x0000C92C, 0x00000D43, 0x00008655, 0x0000FE4E, 0x0000306E, 0x00001263, 0x00001EA5, 0x0000967D, 0x00005EF3, 0x00000932

I could, but it is also pretty easy to take the 420 I posted and derive the original seed using the normal GBA-event restricted algorithm or the 5x, 10x, 15x, 20x alternatives. I think I will leave it up to those who are willing to spend the time (and yes I am sorry for now you have to download them all separately on Pokecheck).

I will go through and find out which need to be added and do it myself once I am able.

You thought you could get away from them? Thanks to Bond697 and myself, we finalized the algorithm for MYSTRY Mew. The 16-bit seeds are very specific and there are 84 of them. I have reconstructed all 420 Mews working backwards and uploaded them here: https://www.pokecheck.org/?p=box&bid=5&u=sabresite. If your Mew does not exactly match by PID/IV/OTG, then its a fake! I will be working with XFR to include checks specifically for these 420 Mews.

My guess is that it doesn't account for possible trades from BW1 to BW2 and since they probably use different hatch algorithms, it will seem illegal. I'll ask xfr to confirm though.