Inazuman vs Kikaider The End of Kikaider-02

Synopsis

Inazuman and Kikaider, two great heroes, clash! The "New Human Empire" attacks the world with a plan to exterminate the human race! Kazada Saburou transforms into "Inazuman" with his supernatural powers. And Jirou "Kikaider," a warrior with a mechanical body, joins in. The two heroes of Ishimori's works finally collide! (Source: MangaDex)