I admit I was pretty surprised to see Layton's Mystery Journey coming to mobile before its 3DS release, but alas Thursday is almost here. To celebrate we've been given a heads-up about this pretty adorable launch trailer.

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Layton's Mystery Journey: Katrielle and the Millionaire's Conspiracy is the next instalment in the Layton series which'll feature Lady Layton as she and her companions try to solve various mysteries across London.

In the 15-second trailer, you'll see an example of the sort of puzzles and layout you can expect from the mobile game. Playable in portrait mode, the 3DS dual-screen has been nicely represented and it looks like it'll feel right at home on mobile.

Of course, only time will tell and Layton's Mystery Journey finally arrives on iOS and Android tomorrow, July 20th, for £15.99/$15.99.