you just have to keep looking then go to the cave near sendoff spring and you can get to the top flloor of the ruins!
nothing really
Nothing except capture 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)
buy the Pokemon platinum book
Umm ask for someone with all of them to show you i will post my friend code later I have all 28 unknow ! and ? included.
There is no cheat for catching all the Pokemon on Pokemon platinum. it's all down to hard work and persistence.
no
Trade Unown from FireRed/LeafGreen, or if you used a gameshark for encountering this pokemon, trade from Ruby/Sapphire.
You can't get Thunderus in Pokemon Platinum at all. By then when Pokemon Platinum was made, no one knew that Pokemon Black and White were going to be made.
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.
Catching and Trading.
there is no code.