Hatsune Miku
A series of rhythm games starting from "" were produced by Sega under license using Hatsune Miku and other Crypton Vocaloids, as well as "fan-made" Vocaloids like Akita Neru. TinierMe also made attire that looks like Miku's for their services, allowing users to make their avatar resemble her. The series has sold 6million copies. "" was developed for the Nintendo 3DS. Miku's appearance in this game is based on the Nendoroid series of figures. Hatsune Miku is also briefly referenced in the game "Recettear", where a young man stargazing sees "The Green-Onion Girl" constellation. Also, in 2013, Saki Fujita voices Fei-Yen HD, a character based on one of Hatsune Miku's modules, in "Super Robot Wars UX"; this appearance does not use Miku's vocal library.
Metal Fighter Miku
In the year 2061 A.D., Neo Pro-Wrestling, a form of wrestling that allows for armour and other enhancements, is rapidly growing in popularity. In this, Miku, a young flighty girl is set to join her friends as the tag team known as the Pretty Four. However, the competition is fierce and their opponents are ready to do whatever it takes to win. Against this, the Four manage to obtain the services of an eccentric coach who trained their hero, Aquamarine. With his guidance, the four start on their fight for the top as they must train within almost inhuman discipline while their matches become more and more challenging as their opponents rise in the ranks.