A direct sequel to Godzilla Against Mechagodzilla (and the only film in the “millennium series” to carry any continuity) Godzilla: Tokyo S.O.S. (also known as Godzilla vs. Mothra vs. Mechagodzilla: Tokyo S.O.S.) starts with an injured Godzilla somewhere in the ocean and a damaged Mechagodzilla in the shop. As politicians fret, the twin fairies from numerous previous Mothra movies show up to point out that Mechagodzilla is blasphemous as he was made from the bones of the dead and if they don’t cut it out, Mothra will declare war on humanity. If the bones are laid to rest, Mothra will step in and fight Godzilla.
QUICK REVIEW: The Job of the humans in a Godzilla film is to fill time (monster rampages are way too expensive to continue for 90 minutes), and to do so in a way that doesn’t run the whole thing into the ground. The humans here do not do their job. Every moment with them is excruciating, be it the drab government officials, the annoying child, the pointlessly angry pilot, or the robot-fixated mechanic. The last is the worst as his character makes so little sense and takes up so much screen time.
The suit-mation combat is well done, and I would rank it with the very best if it was a bit less derivative. Every Godzilla fan has seen the dying moth/baby grubs bit and knows exactly how it will play out. If you’ve skipped the previous Mothra films, then S.O.S. will entertain, but you are better off first checking out one of those.