well you have to have lv. 75 Pokemon's to get to him. he's at the end of the dream yard
You can get Munna at the Dreamyard.
The dreamyard
In Pokémon White 2, Latias can be found in the Dreamyard but Latios will not be available in the game. Latios will be available in the Dreamyard in Pokémon Black 2.
You have to obtain the national dex before you can access the Dreamyard basement. It will be at the far end of the dreamyard.
Bianca gives it to you when you go into the Dreamyard
The dreamyard
You can get Munna at the Dreamyard.
This is available in dreamyard
You get Munna at the Dreamyard.
Route 2,3 or dreamyard
the pansage that the girl gives you at the dreamyard
In the dreamyard after you beat N and Ghetsis.
You have to complete the main plot first. This will open a few new places in old locations, the other part of the Dreamyard is one of them.
Use pansear you get it in the dreamyard
Ghetsis should be in front of Black City for Pokemon Black.
The seven sages are found in: N's Castle, Route 18, route 14, Chargestone cave, cold storage, dreamyard and Relic castle.
Relic Castle,Chargestone Cave,Dreamyard,Check Youtube for the rest