You can find one on Route 12 (requires riding a Skiddo) and Cyllage City (given to you by a man in the kitchen of a house in the southern part of the city), as well as buy one in the Battle Maison.
The pokemon that likes Whipped Dream is Swirlix which is a Pokemon X exclusive pokemon. If you have Swirlix hold the item and then trade it to someone it will evolve to Slurpuff.
You can buy a Whipped Dream in the Battle Resort for 32BP. This is the only place where you can get a Whipped Dream.
The Fairy-type Pokémon Swirlix likes Whipped Dream. If traded while holding it, Swirlix will evolve into Slurpuff!
the dream world is where you can get pokemon from different generations.
if you get enough dream orbs the proffesor will tell you
The Dream of X was created in 1912.
You can plainly get any Pokemon in the Dream World if your patient and to continue searching.
Usually 5 to 10 minutes
The Dream of X has 141 pages.
20
that's on Pokemon black
Dream eater only works on pokemon that are currently asleep. However, as a ghost type move, dream eater has no effect on normal type pokemon, whether they are awake or asleep.