Pokemon Soul Silver Cheats

It can be a little difficult getting the last 2 Unowns (! and ?) in the game. Well, I will show you some ways to get them.
1. Complete all 4 Slide Puzzles.
2. Unlock all 4 Doors at the back.
3. Catch all 26 Unown (A-Z).
4. If you drop down the holes in the back rooms, you will see some messages.
----------------------------------------------------------------------------
ONCE YOU DO ALL THAT...
Bring an Unown to the Main Entrance, and click on the yellow tile at the back.
A scientist will come up to you. You will both go back to the Research Lab, and he will add another entry.
----------------------------------------------------------------------------
Once you do all that, go to the Main Entrance and Unown ! and ? will appear. Just run around, and they should appear!
Happy UNOWN-ing!
-Kirb
P.S. Rate up, thanks! ^_^

In the same rooms where you have to complete a picture puzzle of Kabuto, Aerodactyl, Ho-Oh, or Omanyte, there is a plaque that has a word that is spelled using Unowns. Complete the following steps to get the hidden items:

Room with the Kabuto Puzzle: The word is "Escape". You must use an Escape Rope while facing the plaque. You can easily get an Escape Rope at the Violet City Pokemart. The four items you receive are Energy Powder, Heal Powder, Oran Berry, and Pecha Berry.

Room with the Aerodactyl Puzzle (accessible by Surfing): The word is "Light". Use Flash while facing the plaque. The four items you receive are Energy Root, Heal Powder, Moon Stone, and Sitrus Berry.

Room with the Ho-Oh Puzzle: The word is "Ho-Oh". You must have Ho-Oh first in your roster. The items you receive are Charcoal, Leppa Berry, Life Orb, and Revival Herb. In Pokemon HeartGold, Ho-Oh is obtained in the Bell Tower. In Pokemon SoulSilver, Ho-Oh is obtained after you have defeated the Elite Four.

Room with the Omanyte Puzzle: The word is "Water". You must have a Water Stone in your bag. The items you receive are Leppa Berry, Mystic Water, Stardust, and Star Piece. You can get a Water Stone by winning it at the Pokeathlon on Wednesday.