Super Mario Kart
As the series has progressed, many aspects included in "Super Mario Kart" have been developed and altered. The power-up boxes which are flat against the track in "Super Mario Kart" due to the technical limitations of the SNES became floating boxes in later games. The roster of racers has expanded in recent games to include a greater selection of Nintendo characters including some which had not been created at the time of "Super Mario Kart's" release – such as Petey Piranha from "Super Mario Sunshine" who appeared in "Mario Kart: Double Dash!!". Multiplayer has remained a key feature of the series and has expanded from the two-player modes available in "Super Mario Kart"; first to allow up to four simultaneous players in "Mario Kart 64" and eventually up to twelve simultaneous online players in "Mario Kart Wii". Many of the track themes have been retained throughout the series, including Rainbow Road – the final track of the Special Cup – which has appeared in every "Mario Kart" console game. Other features present in "Super Mario Kart" have disappeared from the series. These include the "super-powers" of the computer characters, the feather power-up which allows players to jump high into the air and having a restricted number of lives. The only other "Mario Kart" games to feature the coin collecting of the original are "Mario Kart: Super Circuit", "Mario Kart 7", and "Mario Kart 8". The aspects of style and gameplay from "Super Mario Kart" that have been retained throughout the series have led Nintendo to face criticism for a lack of originality but the franchise is still considered to be a beloved household name by many, known for its familiar core gameplay.