You can only get that Pokemon if you have it in your DS game. You have to Transfer it to the game.
Since mismagius is a ghost type Pokemon counter with a dark type Pokemon like honchkrow.
Mismagius cannot be caught in platinum.
It is not possible to get Mismagius by yourself in Pokemon Diamond. The only way to get a Mismagius in Pokemon Diamond is to trade one from Pokemon Pearl.
No, mismagius was not created in the time of that game. You can catch a misdreavus though.
Mismagius is #429 in the national pokedex, and it is a Ghost type Pokemon.
It is Mismagius.
Mismagius and Honchkrow.
misdreavus to the mismagius
Drifblim, Gengar, and Mismagius
it is in the castle.
The Dusk stone will evolve Murkrow into Honchkrow and Misdreavus into Mismagius.
misdreavus does not level evolve into mismagius it evolves by using a dusk stone