Many course themes recur throughout the series. Most are based on an existing area in the Mario franchise (Bowser's Castle being among the most prominent), but there are a number of courses that have not appeared elsewhere, but still belong in the Mushroom Kingdom, such as Rainbow Road. Each game in the series includes at least 16 original courses and up to 6 original battle arenas. Each game's tracks are divided into four "cups", or groups in which the player has to have the highest overall placing to win. Most courses can be done in three laps. The first game to feature courses from previous games was Mario Kart: Super Circuit, which contained all of the tracks from the original Super NES game. Starting with Mario Kart DS, each entry in the series has featured 16 "nitro" (courses belonging to its own game) and 16 "retro" tracks (courses from previous Mario Kart games), spread across four cups each with four races. In Mario Kart 8, 16 additional tracks are available across two downloadable packages, eight for each package downloaded, including seven retro courses, four original courses, and five courses based on other Nintendo franchises, including Excitebike, F-Zero, The Legend of Zelda, and Animal Crossing.
As Mega Man defeats each of the Robot Masters, he finds capsules of the strange energy Dr. Wily took from the island. When he returns to the lab, he gives the samples to Dr. Light for study, but the robot he found earlier breaks free and heads out to the desert. Mega Man goes after him and briefly fights him, but realizes that his opponent is holding back. Before he can consider it further, the robot flees and Proto Man appears, telling him that Wily's new headquarters is up ahead.
Though Capcom owns the rights to all Mega Man games and has been responsible for the development of all of his console titles, it has in the past licensed the Mega Man character to other companies for PC releases. Mega Man and Mega Man III (with no relation to the NES games of the same name) were developed by the US-based Hi-Tech Expressions, the Mega Man game published on the Game Gear by Sega, and Rockman Strategy was developed and released exclusively in China by AcerTWP. Neither title has since been regarded by Capcom as an official Mega Man series game.