A spin-off of Giant Robo: The Day the Earth Stood Still Ginrei and Tetsugyu take a wild west trip into the desert to find something that is at least semi-serious.
| Actor | Role |
|---|---|
 Sumi ShimamotoGin Rei (voice) | Gin Rei (voice) |
 Kazue KomiyaYoushi (voice) | Youshi (voice) |
 Masashi EbaraProfessor Go (voice) | Professor Go (voice) |
 Norio WakamotoTaiso (voice) | Taiso (voice) |
 Seizo KatoSchwartz (voice) | Schwartz (voice) |
 Shozo IizukaTetsugyu (voice) | Tetsugyu (voice) |
 Takeshi AonoIssei (voice) | Issei (voice) |
 Unsho IshizukaFedine (voice) | Fedine (voice) |
 Kazue TakahashiRudo (voice) | Rudo (voice) |
| MMasamichi SatoRudo's Father (voice) | Rudo's Father (voice) |
 Mizue OtsukaRudo's mother (voice) | Rudo's mother (voice) |
 Junko NodaNot listed | Not listed |
 Makiko OhmotoNot listed | Not listed |
 Koji YadaChandana (voice) | Chandana (voice) |