Since you are asking about The Great Ace Attorney Chronicles in relation to " CODEX exclusive

The doorbell rang—a sharp, frantic clatter that cut through the deduction. Into the room burst a man who looked like he had been put through a laundry mangle. He wore the robes of a high-ranking clerk from the Old Bailey, but his face was white as parchment. the great ace attorney chroniclescodex exclusive

For completionists, the exclusivity is a nightmare. Because the game doesn't track which "Failed Testimony" entries you have, you must follow a 70-step guide to ensure you miss specific contradictions at the right times. One popular YouTuber, Sholmesian Deductions , spent 40 hours creating a spreadsheet titled "The Exclusive Codex Completion Path." Since you are asking about The Great Ace

The Codex’s logic web connects evidence nodes before the trial reveals them. In Resolve Case 2, opening the web early shows a line connecting “Discarded Pipe” to “Defendant’s Alibi.” That’s a late-game twist shown at hour two. The UI actively spoils you if you’re curious. For completionists, the exclusivity is a nightmare