In later years, some games have been removed from the service due to their licenses expiring, namely "R-Type" and "Teenage Mutant Ninja Turtles", among others. The three "Donkey Kong Country" SNES games produced by Rare were unknowingly withdrawn. Since Nintendo retains the rights to these games, the reason for their removal remained unknown, however they have since been released on the Wii U eShop and were also added back to the Wii Shop Channel as well. "Sonic the Hedgehog" and its sequel "Sonic the Hedgehog 2" were both removed in Japan in 2012. While the games returned to the Wii Shop Channel in 2013, they were removed yet again on October 30, 2015 on the Japanese Wii Shop Channel and Xbox Live Arcade in that region while the 3D Classics versions ported by M2 are still available on the Nintendo 3DS for download via the 3DS eShop. However, both North America and Europe still have both games available to download on the Wii Shop Channel and Xbox Live Arcade. While these and other removed titles can no longer be found or purchased from the Shop Channel, they remain available to those who have purchased them prior to their removal. Such users may still re-download them on their Wii consoles and even transfer them to a Wii U system using the "system transfer" tool. Any Wii Virtual Console titles can be transferred to the Wii U and played via its "Wii Mode".