Doraemon: Nobita to Tetsujin Heidan  

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In a world where giant robot parts rained down from the heavens, Nobita and Doraemon took them into their own dimension to construct a machine known as Zandacross. This formidable weapon was kept hidden due to its potential danger. However, when Lilulu emerged as an enigmatic figure seeking control of Zandacross for her invasion plans, the group decided not to participate in such destructive actions. Despite their reluctance, Doraemon and his allies joined forces once more to prevent the robot army from wreaking havoc on Earth. It appeared that Lilulu alone possessed the ability to halt the invasion.