There are at least six known defendant lobbies in the Los Angeles District Court used to house defendants and their defense teams. They are used before and after trials, as well as during recesses, to discuss the trial and to prepare the defense's case. Defendant lobbies are soundproofed to prevent people from overhearing the defense teams inside. Prosecutor's lobbies also exist, but have only been mentioned once. Defendant Lobbies 1 and 2 are especially notable for being involved in two incidents, one a double murder occurring in 2012 and the other being Zak Gramarye's disappearance in 2019.
Lobbies No. 1 and No. 2
Phoenix Wright has used Lobbies No. 1 and No. 2 in his first six trials and his last two trials before his disbarment, more than other lobbies combined.
The following defendants used Lobby No. 1:
- Maya Fey and Phoenix Wright for the murder of Mia Fey
- Will Powers for the murder of Jack Hammer (Lobby No. 3 was also used)
- Maggey Byrde for the murders of Dustin Prince (Prince's murder) and Glen Elg (Elg's murder, retrial)
- Iris for the murder of Elise Deauxnim
The following defendants used Lobby No. 2:
- Larry Butz for the murder of Cindy Stone
- Miles Edgeworth for the murders of Robert Hammond (Hammond's murder) and Gregory Edgeworth (DL-6 Incident)
- Lana Skye for the murder of Bruce Goodman
- Wocky Kitaki for the murder of Pal Meraktis
- Machi Tobaye for the murder of Romein LeTouse
- Zak Gramarye for the murder of Magnifi Gramarye
- Main article: Turnabout Reminiscence
A woman going under the pseudonym of "Calisto Yew", who was a mole planted into the Yatagarasu working for the Cohdopian smuggling ring, hired Mack Rell to kill Deid Mann, and acted as his defense attorney when he was caught on camera. She told him that he would be acquitted if he claimed to be the Yatagarasu at first, but then pointed to the case's prosecutor, Byrne Faraday, as the real Yatagarasu during his trial. After he did so, Faraday interrogated Rell in Defendant Lobby No. 2. "Yew" came in, stabbed Faraday with the "knife" form of the Yatagarasu's Key, then had Rell play the surveillance video of his murder before shooting him and opening a window. She then left, ran into Tyrell Badd and went into Lobby No. 1 and talked, spilling her strong perfume to make Badd open the window. When the gunshot that killed Mann was played, Badd heard it, discovered the bodies, and was led to believe that the murder had happened just then, giving Yew an alibi. Nonetheless, Faraday's replacement Miles Edgeworth exposed Yew as the killer, though she escaped with the Yatagarasu's Key.
- Main article: The Lost Turnabout
Shortly before Byrde's trial for the murder of Dustin Prince, Richard Wellington attacked Wright to retrieve his phone, which held evidence incriminating him. Wright subsequently briefly suffered from amnesia, but nonetheless managed to prove Wellington to be the true killer with the help of his client. He recovered his memory shortly after the trial ended.
A magician's trick
- Main article: Turnabout Succession
During Phoenix Wright's last trial before his disbarment, when he was found to have presented forged evidence, his client Zak Gramarye suddenly disappeared from the courtroom. He escaped into Defendant Lobby No. 1, while his daughter Trucy used her gigantic puppet Mr. Hat to lure the bailiff into Defendant Lobby No. 2, throwing him off while Zak escaped.
Lobby No. 3
Lobby No. 3 has the distinction of being the only defendant lobby used by all four of Mia Fey, Phoenix Wright, Apollo Justice, and Athena Cykes. The following defendants used this lobby:
- Phoenix Wright for the murders of Doug Swallow (Mia Fey as lawyer) and Shadi Smith (Apollo Justice as lawyer)
- Will Powers for the murder of Jack Hammer (Lobby No. 1 was also used)
- Maya Fey for the murder of Turner Grey
- Matt Engarde for the murder of Juan Corrida
- Damian Tenma for the murder of Rex Kyubi
- Ora Shipley and Sasha Buckler for the murder of Jack Shipley
- Juniper Woods for the murder of Constance Courte
- Trucy Wright for the murder of Manov Mistree
- Ellen Wyatt for the murder of Dumas Gloomsbury
This lobby was also used for the civil trial between Apollo Justice and Phoenix Wright.
Lobby No. 4
The following defendants used Lobby No. 4:
- Terry Fawles for the murder of Valerie Hawthorne
- Ron DeLite for the theft of the Sacred Urn and the murder of Kane Bullard (trials)
Lobby No. 5
The following defendants used Lobby No. 5:
- Max Galactica for the murder of Russell Berry
- Solomon Starbuck for the murder of Clay Terran
- Juniper Woods for the courtroom bombing and murder of Candice Arme
- Athena Cykes for the murders of Clay Terran and Metis Cykes
Lobby No. 6
The following defendants used Lobby No. 6:
- Before Turnabout Succession, the player never had the chance to examine a lobby or move away from it. This was due to all previous visits being during the trial phase of cases, as examinations can only occur during the investigation phase.
- Zak Gramarye's trial has been the only time that the court bailiffs that normally stand in the background of the lobby have not been visible.