The narrative held promise initially, but the final result was simply awful. The conversations felt immature and ridiculous; at times, it resembled an episode of Power Rangers. It appeared to be driven by a Japanese fascination with robots. Rather than developing complex characters, introducing numerous figures only served to make things more muddled. There wasn’t really anything that reflected Japanese culture within the film. It almost seemed like the entire movie was created by children. It should have just been a ninja film; at that point, they could have added zombies, aliens, and Godzilla too. Ultimately, it's complete garbage. The decent animation couldn't compensate for the silly and childish fantasy on display.

Source on TMDB