Soul DS

Found a silly issue: in a Black 2 or White 2 save, checking the EntreeForest tab in Block Data (no need to edit anything there), then checking the Forest tab in Misc Editor will report tons of invalid Pokemon being present while it should not happen.

Isn't the Umbreon from Colosseum shiny-locked?

The two Black saves and the Pearl save only contain blank data (all FF), a DeSmuME footer, and a tiny bit of data, but no real save data on its own, so nothing can be done with those. The HeartGold save file seems to contain (at least partially) legitimate save data, but I don't know at all how to properly investigate that nor do I know the root cause, so I think for further checks this will need to be done by someone else. On this, you mentioned the save file is from a randomizer: do you know exactly which randomizer it was, in case the Hack ROM has incidence on the save file format (though do not share the ROM, just knowing the Hack ROM)? May be good to know if someone else want to tackle the topic.

Wouldn't have fully suspected that, as I would have more expected the save file being "altered" this way leading to the game itself consider it as corrupted, the more you know. That's a bit the thing with heuristics, especially in Pokémon where games are made out of a bunch of unique game data varying by save file, it's hard to narrow down elements so that's not that surprising. As long as the command to access it either makes sense or is explained in advance (can be checked by users without discovering the comment on a forum post), it could work.

A bit off-topic but I was wondering, seeing this post and the Black save file being recognised as an HeartGold save file from a few weeks ago in another post, but why isn't there a manual game selection option in PkHex for such cases? Bugs if incorrect types were to be selected/not easily accessible for users? (in addition to ultimately not solving the heuristic issue?)

Edited the Heatran variable to be at 0 (not activated) instead of 1 (battleable) seems to do the trick to make the event no longer broken (or at least partially: Buck doesn't appear in the cutscene inside the mountain, but it doesn't cause any issue and he will appear normally for the cutscene outside of Stark Mountain, while Heatran will be able to be challenged after returning there). POKEMON PL.sav

This is an issue that was found and reported in the latest stable version of PkHex, and has since been fixed in the development build, so if you want to use said feature without waiting for a new stable version you can use the development build.

I don't think enough information was provided here to come at a proper conclusion, but since the met level had to be edited, I suppose it may have been that you tried to set your Geodude as a Golem without editing its level, which would be impossible in normal play (to evolve your Geodude into a Golem, you first need to evolve it into Graveler, requiring to level it up by one level since those from Route 12 are already at evolution level, thus requiring it to at least be one level higher than the met level). From what you're telling, I guess the met level was reduced by 1 or more to make it legal.

Was wondering, I could understand boulders being incorrectly set as part of the save file (supposedly if they weren't switches, but rather set of coordinates where the boulder should go, with it being corrupted leading to issues here), but what could explain the trainer part that was mentioned? Unless it's an active cheat code leading to the issue.

Aren't you suppose to push the boulders from the side, by finding the sub-areas, thus them not being visible here is normal? It's been a long time since I last played so I could be wrong. What do you mean also by the trainers are disabled? They aren't present? There aren't any on the place you shared, so it's hard to say anything. Overall, for save issues when possible, it's best to send the save file so that if anything is wrong in it it can be checked, as for now the statement alone doesn't give much info of what could be wrong.

I'm not sure if those events would work as-is if imported in a German save file, since from what I understand, those custom cards execute code from very specific locations in the RAM and ROM that may differ between versions and languages, thus not being compatible with your game. May want to ask to I'm a Blisy for more info and help on the topic, I suppose.

Attempted to use the flag researcher feature on Black 2 save files (tied to another topic on the site I just answered where I had to take a look at flags), but the feature to compare two save files doesn't seem to work at all (always returns a "Save File Types are different."... even if the two save files are from the same game that the program can open, and worse, the same message is displayed even if I point the old and new save file to the same save file, or if I point to a duplicate of the save file).

The flag 804 was ON instead of OFF, which prevented Hugh from spawning, thus preventing the event taking place after beating the gym from happening. Here's a fixed save file for the issue: POKEMON B2.sav Seeing that you messed around a lot in your save file (cheated items, moves...), it's very well possible that you have other issues later down the line needing fixing (especially since I have no idea how you ended up with that in the first place), but I suppose it's a story for another time.

Not sure if it's considered important, since here it's "Pokémon that should be illegal but flagged as legal", but from what I'm understanding, since Pokémon with Transform cannot participate for Pokéstar Studios recordings, Ditto should be flagged as illegal if it has any Pokéstar Studios data. At a quick glance, the extra byte 0x87 seems to dictate the Pokéstar status, with 255 being star animation enabled, other values likely used to know how much your Pokémon has progressed/is famous, and 0 being the default value.

No date is tracked in the generation 1-3 games, since the gen 1 games + FRLG don't have any clock, and the gen 2 and RSE only keep track of days passing, not of specific dates. When moving your Pokémon to generation 4, the date of the transfer will be assigned (based on the date set in the DS, if done legitimately), and when moving it to generation 5, the date will be changed once more based on the date of the transfer to generation 5 (once more using the DS date): this generation 5 date is what is used for all of the games post generation 5. When transferring Pokémon from generation 5 to generation 6 using Poké Bank, a country and region is set for your Pokémon based on what was set in your 3DS: since it's unrelated to the language of the Pokémon itself (you could be transferring English, Spanish, German, Italian, Japanese, French, Korean Pokémon independently of the region of your console and language of your game), this setting doesn't really matter. As far as I know, the storage of the country and region was dropped in the Switch games, meaning it wouldn't matter either on the long run, so feel free to keep it as-is or edit it if it worries you. Not aware of any ban possible in your case since from what you're telling, the Pokémon would be identical to one that could have been received back in the days = legal Pokémon.