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.
Crypton Future Media
Due to the success of placing a character on the box art of Meiko, the concept was carried over to her successor Kaito and later Vocaloids to encourage creativity, however neither Vocaloid's box art originally had the intention to represent that Vocaloid. Though Meiko experienced good sales, Kaito was the only one who initially failed commercially, causing less demand for male voices for a while after Kaito's initial release. However, sales eventually picked up and Kaito later won the Nico Nico Douga second best seller award of 2008. Meiko and Kaito are reported to be in discussion for an update. Several updated vocal expressions have already been recorded for Kaito.
In April 2011, it was confirmed six vocal expressions had been recorded for Kaito, two of which were dropped and the remaining four were being brought forward with one having reached alpha stage already. The Character Vocal (Hatsune Miku, Kagamine Rin/Len and Megurine Luka) series Appends had been created from vocal performances of their voice providers, however the new Kaito Appends were created by adding echo, force and tension to the samples.