It was used to train Minako to use her powers without her realizing it. In the Sailor Moon anime and manga, Usagi was a fan of the Sailor V Game and often visited the Game Center Crown to play it. In the manga, she was also trained by the game without realizing it and the game character even spoke to her once. Also in the manga several of the Senshi's items like, Usagi's Disguise Pen, Ami's transformation pen, and their communicator watches all came from the game.