Would you be able to upload the three Pokemon as .pkm files? It makes it easier to use those for a starting point. Are they in the same state as they were caught? No problem if not, but it would be nice to have the files to keep for them in their original specification (I seem to be amassing a large collection of .pkm files).
For the Hidden Power type, this is dependent on the IV's.
Codes for SS and HG are identical, so the one code can be used in both games.