I believe the entire alphabet, including others such as ? and !
Nothing happens.
28
Ummm..... in the unknown cave near solaceon town (if that's how you spell it)
go to solaceon ruins then catch 26 unkown A-Z then the tunnel will be finished and you will be able to catch the ! and ? unkown in the room at the back of the tunel !
you have to go to the unkown place and defeat 100 unknown in a row without losing the same with jirachi
Unkown(pokemon)
The Pokemon Unkown.
there is only the sinnon region is Pokemon diamond
There is only one region in Pokemon diamond.
really nothing
You can't but you can trade them
Ash has 6 Pokemon in Diamond version