Hardware Homebrew Is there a way to move pokemon from gen 4 to gen 5 and beyond while preserving their met dates?

[TheMismatcher]

I have completely full boxes in HGSS, and many boxes of pokemon in my other gen 4 games. I would love to move the pokemon all the way up eventually into Pokemon Home via Pokemon Bank, but really dislike how the met date is changed to the date of transfer to gen 5 from gen iv upon using poke transporter within gen 5. Even using PKSM, the date changes to the date you moved the pokemon from PKSM into Gen V. Similarly, the met date is changed upon using Pokemon Chest.

Is there another tool or way to bring the Pokemon up while keeping the met dates? Or is my best bet to change the date on my 3ds to the date of capture of the mon, then move with poke transporter or PKSM? Which is doable, but takes a very long time.

I can also manually edit caught dates in Pokemon Chest, but could that cause any legality issues? Keeping the legality flags is important to me as well. And again, this process is time consuming when I have a completely full PC.'

Was wondering if there was a better or faster way.

 

[Materia_tofu]

My suggestion is to keep your 3ds at the current date and edit the dates of the Pokemon to you see fit
iirc it should be fine as long as the met date and the game origin along with met location & PID are all good
in regards to the first 3 checks i mentioned a example of it being an obvious no no is:
"Torchic lvl 5
Met date: 1999
Met Location: Cerulean City
Game origin: Leaf Green"
This might not be the best answer for you but it's an example of just how annoying editing Pokemon can be
but afaik, no changing the date to be within reason should not affect legality unless it's an event mon if you really wanna be careful with this i suggest doing this on PKHEX as I've had inconsistent results when checking a mons legality through PKSM, idk about PKSM but you can always backup your Pokemon with PKHEX by exporting the .pk3 file of said Pokemon of choice, i hope this helps!