Pokémon SoulSilver Version Tips

Real Way to get the 27th and 28th Unown
Do what the other cheats and hints say... gather the first 26 unown. But, when you find the hidden room in each separate chamber, go down the hole. This will lead you to a room with encryptions on the floor. You must do this with all four chambers.
Go to the research center and talk to the guy near the bookshelves. He will talk- just ignore him... then go to the Hall. Go to the wall behind the ladder, and press A on the new picture. A guy will come and talk to you. Again, ignore.
Then, use your white flute if you have it, go to your POKeGEAR and move the dot to the middle, then roam around the hall. You will encounter the ! and ? Unown.