The answer depends on the exact nature of the puzzle.
Puzzle No 125: Connect the Bots, Unknown Future. Look at the Screens in front of you. You will need to have solved puzzle 124, Answer = pick the room with the Red dot. Please see the related link below for a walkthrough of this puzzle.
In Pokemon heart gold & soulsilver you must complete all the puzzle and have unlocked all the areas before you are able to get all the unknowns
A puzzle or an unknown circumstance. A situation that has not yet been solved with an explanation.a mystery is like a puzzle and a secret
you need two solve the 4 puzzle and when u solve the 4th u keep battling wild Pokemon and capture them all
The Tanoby ruins contain the Unknown Pokemon once the Tanoby key puzzle is solved. The Unknown Pokemon form the letters of the alphabet.
to get unknown you go to ruins of alph and do the puzzle of a legendary pokemon(i dont know which one) after that you fall in a hole and then search for it somewhere.
u can catch unknown or maybe a legendar, im not sure cuz i dont have that game but i have the kinda like an expansion but not really SoulSilover and there if u get all of the unknown(the alphabet+the ! ? unknown)i think u can do the arceus event if u have arceus.
NTUPLE THIS WAS THE ANSWER GIVEN IN A 2008 NY TIMES CROSSWORD PUZZLE
just do the first ruins puzzle and you will fall down a hole then the unown appear
the last two unknown are supposed to be in the hall entrance after you catch the first 26 and complete every puzzle.
go to the ruin of alpha and go to the temple near the top solve th puzzle then you fall in and all the unknow start appering