User blog comment:Thegoldnguy/The strongest Godzilla monsters?/@comment-3367060-20140116232036

0. Godzilla Pseudo-1. Bagan (He was hard to beat even as Super Godzilla.)
 * 1) Super MechaGodzilla (It killed Godzilla, but Fire Rodan came.)
 * 1) Monster X/Keizer Ghidorah (Almost killed Godzilla, but Ozaki came.)
 * 2) King Ghidorah (Showa and Heisei only. Millennium was really weak.)
 * 3) Destoroyah (Much stronger than Burning Godzilla, but that cold weakness...)
 * 4) Kumonga (Showa, he almost killed Godzilla.)

Honorable mentions: MechaGodzilla 1 (Turned Godzilla into a blood sprinkler.), Hedorah (Was almost undefeatable, until blood covered Hedorah's eyes.), Cretaceous Ghidorah (Caused the mass extinction of the dinosaurs.)