All the letters plus the new's "!" and "?".
All 28 Unown are available in Pokémon FireRed within the Tanoby Ruins on 7 Island.
The tanoby ruins consists of many different chambers inside you can find and capture the pokemon Unown but only after solving the boulder puzzle in Tanoby Key which is a cave not to far from the ruins.
The Tanoby Ruins is a very special place. You can catch Unown there! But, in order to make Unown apear there, you must unlock them. To do this, go to Sevault Canyon on Seven Ilsand. Find the Tanoby Key there, and solve the rock puzzle with the HM Strength. Once you do, there will be a small earthquake. Now, go to the Tanoby Ruins, choose a ruin, and Unown will apear like wild Pokemon! And the best part is, you can have as many as you want!
in one of the sevi islands u will find chambers in each one you will find a few unowns really they are in the tanoby ruins. to get there you go to seven island and go south. eventually you will come to an ocean. use surf right or left and go down a bit and you will be there. there are many of them, and if you are looking for a specific shape or letter (a, b, c,...and so on, or 1,2,3...and so on, encluding some unknown shapes) as different ones live and roam around in different tanoby ruins.
There are 28 Unknowns... The alphabet, Question mark, and Exclamation point.
You find this button on island 7 (you can go there once you beat the champion), then you find a boulder use strength to push it onto the button. The button opens several caves in each cave you find different Unknowns.
Venice has many ruins or canals?
Use Strength to push the boulders into the small holes each time you put one in a hole you should get an earthquake when you put the last one there should be many earthquakes. Go to the tanoby chambers and walk around you should eventually find the Pokemon unown.
There 28 of them. One for each letter of the alphabet and one each for the exclamation mark and the question mark.
Curse of the Ruins has 96 pages.
The Ruins of Ambrai has 848 pages.
Ruins of Adventure has 96 pages.