Wait, does Godzilla Lore have multiple Godzillas?
Three, sometimes. Godzilla continuity is not so...continuous.
In 54-75 there were primarily two godzillas. The one in 54 dies but then another one shows up very soon after. It also has a single child that never reached maturity in the series. This is really the only series in which you see more than one godzilla actually active in different movies (54 vs the rest).
84-95 again the original godzilla in 54 was dead, but the second did not show up until 30 years later. The movies follow this second Godzilla. When the second Godzilla died, it was replaced by a third (which only made a brief appearance in the final scene of the series).
2000: Reboot. If I remember correctly, this one assumes that Godzilla survived the oxygen destroyer and took a long time to heal. So only one Godzilla.
2000 (Megaguirus): I think this one reboots again and takes a similar stance to 2000.
2001 (GMK): Reboot again. In this one I believe it's the same Godzilla having regenerated after the 1954 attack and powered by the souls of the dead or some really metal shit like that.
2002-2003: This series follows a second godzilla again, assuming the first died in 1954.
2004: This reboot splices Godzilla's dna with Goku and I dont even remember what the hell was going on in this movie.
Man all this bluray talk makes me wish I could finish out my Godzilla bluray collection. There's still a handful of Showa Era movies that haven't made it to bluray yet.
I've been waiting not so patiently for a long time for Terror of Mechagodzilla on bluray. #1 on my list of Godzilla movies that have not yet made it to bluray (at least not in the USA).
Give me a two pack with that and the movie that preceded it and I would be really happy.