Watched a few of these over the weekend, thinking about trying to get through the entire catalog (I’ve seen about a third of them, but it’s been a very long time apart from the ones I just watched). I’m grading these against each other, meaning regardless of how they stack up against any other movies, an A+ is the original Gojira and an F is anything with Godzilla’s doofy son in it.

Godzilla, King of the Monsters!: C+
Mothra vs. Godzilla: A-
Ghidorah, the Three-Headed Monster: B+
Godzilla 1985: B-
Godzilla vs. Mechagodzilla II: C+

The only other two I’ve watched recently enough to be able to rate them were Gojira (A+ on this scale) and the 2014 Godzilla (a B). I plan on working my way through these in the next few months, so I’ll give updates as I go.