Mystical Ninja Starring Goemon known in Japan (がんばれゴエモン〜黒船党の謎〜, Ganbare Goemon: Kurofune Tō no Nazo, translated "Go Goemon: Mystery of the Black Ship Gang") is a Ganbare Goemon series Game Boy game released in 1998. Featuring gameplay similar to the Super Famicom title Ganbare Goemon 3: Shichijuurokubei no Karakuri Manji Katame, the game presents a new story in which Yae had been kidnapped by the Black Ship Gang. Its release immediately followed the Nintendo 64 game of the same name.