Puzzle & Dragons from Gungho has been the most popular mobile game in Japan over the last couple of years and it has also been very successful on Nintendo 3DS. Recently a version of the game featuring Mario and the Mushroom Kingdom was announced and confirmed for Western release. This game, that is officially titled Puzzle & Dragons Z + Puzzle & Dragons: Super Mario Bros. Edition will be released in Europe in May - and gameplay was featured during today's Nintendo Direct.
The concept of Puzzle & Dragons is that of combining a match-3 puzzler with classic turn-based RPG battles.