User blog comment:ShodaiMeestonLarva/"Godzilla vs. Kamacuras" and "Godzilla vs. Bagan": Real or False?/@comment-3367060-20150802063357

The sources for both of those are unknown to us at the moment. Japanese Wikipedia doesn't list either of them. So probably false, but then again they might not have every single thing, it is a wiki after all.