Is the data of Pokémon stored somewhere when traded away?

I wanted to keep my starter from when I first played Pokémon with me, so I traded them forward, from Platinum to Soulsilver. One day however, I would lose my copy of Soulsilver and all my Pokémon from Sinnoh. While this is a total Longshot, is it possible that an instance of the Pokémon traded away exist somewhere in the data of my copy of Platinum? I never had the heart to get rid of my old save file. Should I cut my losses and move on? Or is there a chance I can get my Pokémon back?

Pleaselog inorregisterto add a comment.

No, Gen 4 games don’t commit anything to the save file about Pokemon traded away (except the full struct for the Pokemon deposited to the GTS, if any, and assuming you count that as a traded Pokemon to begin with).

However, assuming you beat the Pokemon League with some of the Pokemon you want to retrieve, you may still be in luck. Gen 4 does store non-trivial information about each entrant to the Hall of Fame, which you can easily verify with your own game. The data stored for each entrant includes:

Even better is you also get the Pokemon’sability, nature, size, and Pokeathlon stats, because those are determined by its PID.

What’s missing is anything not listed above that isn’t determined by the PID. This includes data like EVs, friendship, encounter details, Poke Ball, ribbons, held item, and bonus PP. You will also technically miss IVs, but if you know a bit about how the game’s RNG works (introduction to the subject), knowledge of the PID can help you find what the IVs legally could have been, except in the case of egg Pokemon.

If this is enough incentive to see you trek down the path of recovering your Pokemon (and making up some data to fill in the gaps), then the rough process for achieving that would be:

So, clearly there is a barrier to entry here and several limitations. But you can indeed dosomethingto bring your Pokemon back, assuming you did take your starter, etc. through the Pokemon League.