Destroy All Monsters
Even Minilla can't ruin this all-star brawl that carries one of the best human-scale subplots in the series. The best 60s Godzilla film.
Godzilla vs. Gigan
I last saw this in the theater as a child, and while the cockroach aliens are far less creepy now, the 70s films continue to improve. Anguirius gets a hero turn in the Gigan/Ghidorah tag-team match that also teases the Mechagodzilla. Plus the big G gets a few lines of intelligible, manga-balloon speech.
The Terror of Mechagodzilla
The latter Showa films underwhelm with a titular kaiju's introduction, but then slay the following film. No so much here, where a guileless Mechagodzilla just goes through the motions.
As is director Honda, who's been on a slide since the stellar Destroy All Monsters 7 years before. A middling exit to Godzilla's salad days.
@horacemajeur in my youth watching All Monsters Attack, I was confounded by the name of the kaiju who attacks Minilla in Ichiro's dreams: Gabara. It seemed to me to be pronounced as Gamera. I thought that was odd and when I mentioned to multiple friends that there were two Gameras they branded me as crazy. Nobody remembered the electrified "Gamera", only the turtle! Then the Internet came along...
@hallmarc Strangely, despite being aware of kaiju from a tender age, I never saw any Gamera until mst3k. I would've liked those even more than Godzilla, I expect.
All Monsters Attack
Minilla's front and center in this most Gamera-adjacent of Godzilla films. Maybe the least essential in the series.