I was playing my Pokémon Platinum, then I noticed my bidoof was holding a Oval stone. I got the stone from it, and continued playing. The next day, I got another Oval stone from it. Is there something wrong with my Bidoof?
I believe so. It would have been normal if bidoof had the ability pick-up but it doesn't. Pick-up lets your Pokemon frequently pick-up items. The only other way is if your bidoof has the move thief and used it on a chansey,... Other then this there is no-other way. There is probavly just a misfit in your game. At least you can now collect free oval stones.
Hope this helped