by completing the puzzels in the ruins of alph
you get celibi
yes in solaceon
u catch unowns in the Solaceon ruins
if you catch all 28 unknown, including the exclamation mark and question mark unowns, the unowns will spell the alphabet and question & exclamation mark unowns i really dont know what they do.
you catch unowns just to fill out your unown notes. nothing happens when you catch all 28 of them including ! and ?
u dont
catch all the different unowns at lower right in the ruins.
Catch all Unowns (exept ! and ?) Then go to Route 214, and from there, to Mainiac Tunnel, you will find he had finished it. Then follow it.
you have to beat elite 4 then catch all unowns.
yes there is
they are Pokemon shaped like letters
Noi, you cannot make Pokémon with any of the Unowns in Pokémon Platinum.