Layton's Mystery Journey: Katrielle and the Millionaires' Conspiracy is a Nintendo Switch puzzle game in the Professor Layton series. This Switch version follows Katrielle and a new cast through mystery cases with enhanced features and expanded puzzle content.

• Cleaned, tested, and guaranteed to play. Authentic cartridge.
• Puzzle-focused adventure gameplay centers on solving cases through brainteasers, logic challenges, and story-driven investigations.
• Includes more than 40 brand-new puzzles along with refined previous puzzles from earlier versions.
• All DLC is unlocked, adding extra content without needing separate purchases.
• Over 50 new outfits are included for customizing Katrielle’s look throughout the game.
• Supports TV, tabletop, and handheld play, with Nintendo Switch Pro Controller compatibility.

In-game language options include English, French, and Spanish. The story shifts the spotlight from Professor Layton to Katrielle Layton, giving this entry its own mystery cast and case structure.