the letters a-z can be found at the solaceon ruins. after you catch them find the ruin maniac (between vielstone city and pastoria city) who will have finished digging the cave and revealed a new door that connects to the solacion ruins and to a room with a rare candy and the ? and ! unknown
Where all the other Unknowns are. You have to wander about till you happen to find one. I would check between P&R first. ;)
buy the Pokemon platinum book
you find them in the cave
that's hard to say you have to look all over in all the caves and it could take hours
Mabey I have got all 28 Unknowns But nothing happens I thought you were supposed to get A Pokemon etc. Entei,Raikou,Suicune,Moltres, and zapdos.
you see all the Pokemon in platinum and trade from your other games like emerald, blue, fire red etc and that is how you find all Pokemon in platinum.
You can find a bunch of Pokemon but i realy don't want to list them.
nothingnothingOptional Answer:Well once you caught all Unknowns in Solaceon Town On the East the 2nd ledge go into the house talk to the boy he will give you the seals for the letters of your unkowns (Dont worry he wont take the unknowns)it will also help if you need a hippopotas (on Pokemon platinum)
You can find a Hippopotas in Pokemon platinum at "Ruin Maniacs Cave". If you need to find something else about Pokemon go to Serebii.net. They have all the information about Pokemon! I hope I helped!!
you need to download your Pokemon platinum game into the R4 and add cheats in there . Go to Supercheat to find the cheats
you can find them in gartinas cave
You have to defeat all the trainers and find all the Pokemon