Where to watch
Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster isn't on any streaming service in United Kingdom right now, but it's available in Japan. Streaming rights are licensed per country.
Cast · Directed by Masayuki Akehi
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Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster — streaming FAQ
Which OTT platform streams Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster?
Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster isn't on any streaming service in United Kingdom yet, but it's available in Japan. Streaming rights differ by country — switch your country in the header to see where.
Is Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster on Netflix?
No, Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster is not on Netflix in United Kingdom as of September 2026.
Is Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster on Amazon Prime Video?
No, Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster isn't on Amazon Prime Video in United Kingdom right now.
Where can I watch Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster for free?
Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster isn't streaming in United Kingdom yet, so there's no way to watch it free at the moment.
Is there a sequel to Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster?
Yes — Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster is followed by Shin Getter Robo vs Neo Getter Robo (2000) in the Dynamic Pro Super Robot Collection.
Is there a prequel to Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster?
Yes — UFO Robot Grendizer vs. Great Mazinger (1976) comes before Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster in the Dynamic Pro Super Robot Collection.
Is Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster part of a trilogy?
No — Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster is part of the Dynamic Pro Super Robot Collection, which has 16 films.
How many movies are in the Dynamic Pro Super Robot Collection?
There are 16 films in the Dynamic Pro Super Robot Collection: マジンガーＺ (1973), Mazinger Z vs. Devilman (1973), Mazinger Z vs. Doctor Hell (1974), Mazinger Z vs The Great Dark General (1974), Getter Robo (1974), That's a UFO! The Flying Saucer (1975), Great Mazinger vs. Getter Robo (1975), Great Mazinger vs. Getter Robo G: The Great Space Encounter (1975), Battlefield of the Space Saucers (1975), UFO Robot Grendizer Theatrical Version (1975), UFO Robot Grendizer vs. Great Mazinger (1976), Grendizer, Getter Robo G, Great Mazinger: Decisive Battle! The Great Sea Monster (1976), Shin Getter Robo vs Neo Getter Robo (2000), Mazinkaiser vs Great Darkness General (2003), Mazinkaizer SKL (2010) and Mazinger Z: Infinity (2017).
