I think that I've seen a lot of times massive 20 or FF blocks (isn't 20 a spacebar entry?) in my unmodified save files, but I can't understand why they are replaced in specific spots. Also, in PokeSav I can read all the boxes. If I remember correctly, I had every obtainable Pokémon in Platinum through catching, evolving, in-game trading or egg ordered by PokéDex number.
Also, that Bulbasaur was extracted with PokeSav 0.06d (ENG) for sure. I can also attach Ivysaur and Venusar. Whatever you may request from my boxes is backed up.
Edit: attachements got removed.