you can't
Route 212 http://bulbapedia.bulbagarden.net/wiki/TM11
yes
152 is rotom.
An event
there is.... its called Pokemon emerald, Pokemon ruby, and Pokemon sapphire.... there all in the hoen region
you cant because its a pokemon from the hoen series you have to poke transfer it from a diferent game
You can't, you have to Migrate him over or trade.
some of them
Catch all the pokemon in the hoen dex. You may want to trade.
You can't catch Mewtwo in-game in Pokemon Diamond.
It is impossable to get one in Pokemon diamond,but there might be one in Pokemon platinom...... hope that helped!
Pokemon emerald is based on the hoen pokemon..since it is the hoen region.Look in a site called bulbapedia[best site for pokemon].