User blog comment:Kung fu frogz/Killing Godzilla/@comment-3367060-20130703201022

Ghidorah has overpowered Godzilla many times but due to strange coincidences and Godzilla having allies, Ghidorah lost.

Kiryu doesn't get close to killing Godzilla, he jus brawls with him and fires the absolute zero cannon, which leaves a cavity in his chest but it didn't kill him. :/

Gamera hasn't fought Godzilla so it is impossible to know.

Kaiser Ghidorah ALMOST drained the energy of Godzilla but the Kaiser and the Atragon were there and the rest is history.

MechaGodzilla 2 actually destroyed Godzilla's lower brain, paralysing him and if it wasn't for Rodan Godzilla would have been killed.

MechaGodzilla 1 made Godzilla a blood sprinkler, but also made Godzilla a magnet. Oops.

Destoroyah was killed by the military, which is pretty bad when compared to other monsters.

I think the ones with the best chances of killing Goji are King Ghidorah, Keizer Ghidorah and MechaGodzilla 2. However, Keizer Ghidorah had rare odds happen to him and lost, but so did MechaGodzilla 2.

So it's a very close tie between Keizer and MG2, but the odds Keizer encountered were extreme, because a Kaiser that could ally with Earth and give his infinite energy to Godzilla? That can only mean that Keizer Ghidorah is the strongest Godzilla foe.