As Nobita, Gian, Shizuka, and Suneo are making their own space movie, a fleeing bug-sized alien president makes his way to Earth, and needs the help of the kids and Doraemon to stop an oppressive dictatorship threatening his democracy.
| Actor | Role |
|---|---|
 Nobuyo OyamaDoraemon (voice) | Doraemon (voice) |
 Noriko OharaNobita (voice) | Nobita (voice) |
 Kazuya TatekabeGian (voice) | Gian (voice) |
 Kaneta KimotsukiSuneo (voice) | Suneo (voice) |
 Michiko NomuraShizuka (voice) | Shizuka (voice) |
 Sachiko ChijimatsuNobita's Mother (voice) | Nobita's Mother (voice) |
| DDai KanaiXuanwu (voice) | Xuanwu (voice) |
 Keiko HanPapi (voice) | Papi (voice) |
 Yuji MitsuyaRokoroko (voice) | Rokoroko (voice) |
 Yusaku YaraGilmore (voice) | Gilmore (voice) |
 Ryusei NakaoPCIA Soldier (voice) | PCIA Soldier (voice) |
| SSumiko ShirakawaDekisugi (voice) | Dekisugi (voice) |
| MMasako MatsubaraShizuka's Mother (voice) | Shizuka's Mother (voice) |
 Nobuo YanaDorakoruru (voice) | Dorakoruru (voice) |