I've found this GBA or DS adapter of some sort, but I have no clue what it's for.
Pictures:
As you can see, the one end is for a GBA or DS. I've plugged my GBA SP charger into it, that's definitely what it is.
The two plugs on the other side I don't recognize though.
I know my GBA SP and original DS have the same charger, so I suppose it could be for either, but I have a suspicion it's for GBA as it was found with other GBA items.
Does any one have any idea what this could be for?