Hyperspace Boy Wonder Seven is a fictional tokusatsu, mentioned in TV series Giant Robot Mikazuki. This single 25-minutes episode of the "Wonder Seven" was released in 2001 as bonus with the "Tekkōki Mikazuki" DVD-box.
| Actor | Role |
|---|---|
 Takumi SaitohJun | Jun |
| AAsumi NakadaMayumi | Mayumi |
| MMasaki TachiDr. Garigolin | Dr. Garigolin |
 Yusuke NumataJun / Wonder Seven (voice) | Jun / Wonder Seven (voice) |
 Tomoko KawakamiMayumi (voice) | Mayumi (voice) |
 Shigeru ChibaDr. Garigolin / Narrator (voice) | Dr. Garigolin / Narrator (voice) |
 Wasabi MizutaKechompa (voice) | Kechompa (voice) |
 Ryuuzaburou OotomoKirugoa (voice) | Kirugoa (voice) |
 Seizo KatoWonder Stick (voice) | Wonder Stick (voice) |
 Tomohiro NishimuraWonder Blaster (voice) | Wonder Blaster (voice) |