The walls are designed according to franchise, as well as the flooring. The gravity is normal here... There's also a banana peel by room D5.
Quaternary Hall is the fourth floor of The Place. Here, characters can transfer from one place to another. This hallway contains the Tokyo Mew Mew(D1), Care Bears(D2), Camp Lazlo(D3), Spongebob Squarepants(D4) and Lazytown(D5) franchises.