Nintendo has just announced a new mobile gaming partnership with the Japanese company Line, which will see participation for a new Dr. Mario game on iOS and Android. It will be called Dr. Mario World, and is being co-developed by both companies, with additional assistance coming from NHN Entertainment. The game is described by Nintendo as a free-to-play puzzle game with optional in-app purchases. The arrival of the game should be scheduled by next summer, although at the moment a precise date for the release is not yet foreseen. The franchise began with the release of the original Dr. Mario in 1990. The game was designed by Gunpei Yokoi, creator of Game & Watch and Game Boy.