>>51168287>>51164825>>51164836Sorry OP, sadly this wouldn't work; the walker is linked to your ID/SID but the actual data for the pokemon is stored on the cartridge/save file. The pokemon doesn't actually "leave" your game and enter the pokewalker, it just puts the pokemon in an inaccessible storage box that can't be reached normally, and when you "return" it from the pokewalker, it puts the pokemon back in your box and gives it some exp.
They did this because it saves having the actually store any extra data on the pokewalker aside from what sprite it should be using and whether or not you get the type-based bonus to item/encounter luck, and it also means that if you ever lose the pokewalker there's a secret button combo that you can do in the menu to "recover" your pokemon (aka just removing it from the secret box and putting it back in the game).
Even if you managed to make a second save file with identical ID and SID, the game would just fail to pair with the walker because it doesn't think that it's sent anything to the pokewalker yet, and there's not enough data in the pokewalker to "send back" into the game.
