This is the first movie where Grendizer appears on the big screen! And what a title to attract the audience. Who would've ever thought of seeing Grendizer fighting Great Mazinger. Well guess what? That title is misleading, because it wasn't really a fight, otherwise Grendizer would rip Great Mazinger apart.
Makiba Hikaru
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The Vega homeworld is becoming unstable due to the exploiting of Vegatron, a powerful radioactive ore. Seeking to expand his militaristic empire and find a substitute planet to settle upon, the ruthless King Vega unleashes his armies - composed of flying saucers and giant robotic monsters - and turns first against neighbours such as Fleed, a highly advanced but peaceful world…