The eighth and final nail in the original Showa era coffin of Gamera films.
Studio Daiei was as good as bankrupt when they tried to revive Gamera one last time in the early eighties.

As there was virtually no money, there wasn't even a new Gamera suit, no new miniatures or even a new monster to fight. What we got was another spaceship threatening to attack earth, eerily resembling a star destroyer from Star Wars a couple of years earlier. Three space women transform into super women, because Superman was really popular at the time, and call on the help from Gamera through means of... a compilation of all the monster battles from previous films. Sigh

If you've seen all the original seven Gamera films in chronological order, there is no reason to put this on. The new scenes don't add much and they even mix popular animes (Space Battleship Yamato) in a dream sequence. Godzilla is mocked when a movie poster falls on its side reading "The Final Godzilla".

If you haven't seen anything of the Gamera films the best of compilation bits still work and remain awesome, but other than that this is a pointless entry you can skip entirely.

It would take 15 years to recover from this disaster.
Just move directly to the nineties Gamera trilogy and act like this doesn't exist.