Pokemon SoulSilver
Note: This game is also titled Pocket Monsters SoulSilver.
Defeat the Elite Four, then go to the S.S. Aqua ship in Olivine City to get the National Pokedex.
Collect all other twenty six Unown (A through Z), and the ! and ? Unown will appear in the Hall Entrance.
Successfully complete the indicated task to unlock the corresponding color. You can earn stars by completing the following tasks: defeating the Elite Four, finding all Shining Leaves, and capturing all 493 Pokemon (not including event-only Pokemon).
- Blue Card: Earn one star.
- Bronze Card: Earn two stars.
- Silver Card: Earn three stars.
- Gold Card: Earn four stars.
- Black Card: Earn five stars.
- Bronze Card: Earn two stars.
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.
Go to Violet City Pokemon Center. Tell the man next to the PC certain words when he asks you for your opinion. Use this website to generate these words. This will unlock special box wallpapers and Pokemon eggs in your game.
While playing the game, press L + R + Start + Select.