You can find them in solaceon ruins
You can not find or get manaphy on Pokemon diamond but you can by hacking, trading or... if you have Pokemon ranger you have to complete the manaphy mission and then you can put it onto diamond.
You can't find a Ho-ho in Pokemon Diamond. You have to migrate.
I dont know what happen in diamond, but in platinum you can catch ! and ? unowns.
you can find legendary Pokemon by using your Pokemon tracker
You don't. Red's not in Diamond.
Solceon ruins.
#114 is unknown. its found in the soleancean ruins
Unknown(sorry about my spelling) Letter A is the rarest Unknown in all games. You are more likely to find a shiny Pokemon then Unknown A but if you are dedicated then go for it but prepare for frustration.
In Diamond it is in the ruins with the Unknown, I am not sure about Platinum though.
the simble pokemon, unknown.
The Unown are in the Solaceon Ruins.
you can catch a lot of unknown Pokemon A-Z
You can find Pidey in a Pokemon Outbreak in Pokemon Diamond
There are 26 but since there are the ! and ? unknown 28 total
To get a Venusaur on Pokemon Diamond you have to get the National Pokedex and look for its area, if it's unknown then I don't know what to do.
turn back cave
right of solaceon town