Mario's mobile device debut can only be played with an internet connection - ruling out playing it on many modes of transport.
Speaking to Mashable, Shigeru Miyamoto explained that the decision was made for security reasons, helping Nintendo combat the risk of piracy. All three of the game's modes, Toad Rally, Kingdom Builder and the single-player World Tour campaign will require an active connection to access.
"We wanted to be able to leverage that network connection with all three of the
modes," Miyamoto explained, "to keep all of the modes functioning together and offering the game in a way that keeps the software secure. This is something that we want to continue to work on as we continue to develop the game.