Sega trademarked the title "Sonic Lost World" in May 2013. The game was revealed on May 17, 2013 in a Nintendo Direct announcement, as part of an exclusive partnership between Sega and Nintendo for the "Sonic the Hedgehog" series. It is one of three games in this partnership, the other ones being the fourth entry to the "Mario &amp; Sonic at the Olympic Games" series, and "", a game based on the "Sonic Boom" animated series. Sega reported that more on the game would be revealed before E3 2013, and that the game would contain both returning and new original characters, both in enemies and friends of Sonic. The first trailer for the game was released on May 28, a day earlier than previously announced. A downloadable demo of the game's first stage was made available for both consoles on October 9 in Japan and in mid-November in North America and Europe. To promote the release of "Sonic Lost World", Hardlight Studios released an update for "Sonic Dash" that includes a boss battle against Zazz, one of the Deadly Six. "Super Smash Bros. for Wii U" also includes a stage based on Windy Hill Zone from the game as well.