Loblolly's studio is located in the southeast of Nacrene City. After visiting the Dream World at least once, Loblolly will talk about Décor that "people will dream of". Players may choose one of five pieces of Décor that will be unlocked in the Dream World the next time the Game Sync is used. Each day another piece may be chosen.
So you must have visited the DW atleast once so I´m sorry
Source And I`ve connected there