Professor Layton and the Diabolical Box

Professor Layton and the Diabolical Box follows up the Curious Village mystery with a new case: a box rumored to kill anyone who opens it, tied to the death of Layton's own mentor. The trail leads onto a cross-country train and through a series of towns, each stacked with its own cast of eccentric puzzle-hoarding residents.

Over 150 puzzles return with the same story-gated structure as the first game, but the pacing opens up more — train-car exploration and multiple simultaneous story threads give the mystery room to breathe compared to the single-village setup of the original. It's frequently cited as a favorite entry for balancing puzzle difficulty against narrative momentum.

This page hosts the verified Diabolical Box ROM, built for Delta Emulator on iPhone — load it directly with no BIOS file or extra setup required.