Eterna Condominiums (Japanese: ハクタイマンションHakutai Apartments) is a building in Eterna City in Sinnoh.
Areas of interest
Once inside, the old man immediately on the left is the Name Rater, who will nickname the player's Pokémon.
At the top left corner of the room is a boy who will trade his Chatot for a Buizel.
There is also the Superintendent on this level. During certain times at night, the Superintendent will say, "I am this building's Superintendent, offering 24—Zzzz...," noting that he is falling asleep, possibly attempting to say "...offering 24-hour assistance," before he falls asleep.
In front of the stairs is a little girl who talks about Gardenia going to the Eterna Forest.
There is also an old woman standing by a sink who gives away TM67 (Recycle). Across the room from her is an old man who explains how the move Recycle works.
On this floor, the people standing around talk about traps, flags, and trading Berries for Accessories.
This floor is purely informational to new Trainers.