The Right Hall returns in Ultimate Custom Night mode, this time serving as a hallway for several of the animatronics to attack from.
The Right Hall mostly appears the same as in the first game, but with few decorations added to its design. Right there, there are multiple monitors stacked across each other. Also, it appears that the Foxy lamp from FNaF 3 makes a cameo hanging on the wall, alongside the trio of Paper Pals. Furthermore, Mr. Hugs is shown deactivated below the "CELEBRATE!" poster from the original game.
The Right Hall is a hallway where Circus Baby, Nightmare Bonnie, Nightmare Mangle, Jack O' Chica, Rockstar Chica, and Nightmare may attack. All of the animatronics who travel through the right hallway can't be stopped by the office door except for Nightmare. However, the player must use a sound cue to block him, and can't be viewed on the Right Hall camera.
Circus Baby, Nightmare Bonnie and Nightmare Mangle will appear in the Right Hall at odd hours (1AM, 3AM and 5AM). Once one of them appears, the player must buy their respective plushie from the Prize Corner to pacify them, though keeping the camera on the Right Hall will stall them from jumpscaring the player. If one of these three animatronics is in the hall and their replacement is disabled, the replacement animatronic will not spawn and the end of the Right Hall will be empty.