it is on seven island
If you solved the Tanoby Key, the Unown can now be found in the Tanoby Chambers
tanoby key? do you mean braille key? If so, it's in the one island tunnel where you get the ruby.
Answer:it unlocks the Unown in the Tanoby Ruins farther south.
The Tanoby ruins contain the Unknown Pokemon once the Tanoby key puzzle is solved. The Unknown Pokemon form the letters of the alphabet.
After you finish the Tanoby Key you can head down the Sevault Canyon until you reach the odd buildings. If you go in them after you've finished the Tanoby Key you can find Unown in them.
Answer:It unlocks the Unown in the Tanoby Ruins farther south.
They are already open to light them up finish the tanoby key puzzle.
Tanoby key is actually a cave on Seven Island and inside are some boulders you need to use Strength and push all of them onto the black circles once all of them are in place the tanoby chambers will have the pokemon Unown available.
he is roaming Khanto
The tanoby key, and the tanoby ruins in island seven. and of course completing the pokedex!
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.
Once you finish the boulder puzzle in the cave called Tanoby Key on Seven Island enter the Tanoby Chambers and walk around eventually a Wild Unown will appear.