Okay, I take Zeality's Chronology chronology guide as what I go off of, and reading the one at gamefaqs (unless something has been changed), in Keystone T-2, it states the following chain of events for 12000 B.C.
Keystone T-2, of course, is what the "original" timeline of Chrono Cross was. So, we can basically say that if T-2 is where CC starts (barring Project Kid for now), we get this chain of events in 12k BC:
-The Ocean Palace rises as the Black Omen, commanded by a Lavos-appeasing
Queen Zeal.
-Crono's party travels to the End of Time to consult Gaspar about reviving
Crono.
-Crono's party comes in from 1000 A.D. to enter the Black Omen.
-Crono's party defeats Queen Zeal, who warps the party into the Mammon Machine.
-Crono's party defeats the Mammon Machine.
-Crono's party defeats Queen Zeal a second time.
-Queen Zeal awakens Lavos to battle the party.
-Crono's party battles Lavos and enters the shell.
-Crono's party defeats the first Lavos form.
-Lavos mutates into the best combination of collected DNA possible.
-Crono's party defeats Lavos's last form.
-The defeated Lavos presumably finds itself in the Darkness Beyond TIme and
begins merging with Schala, who came in from the Ocean Palace.
-Crono's party returns to 1000 A.D.
-Magus arrives to search for Schala.
For those that need to take a look-see at it in case you want to make certain I'm pulling from the right "dimension", you can find this guide at:
http://www.gamefaqs.com/console/psx/file/196917/28014Okay, so this forces me to modify my original thinking. So, it's not the first time Crono fights Lavos (because he dies and then everyone warps around doing things before finally bringing Crono back to life). However, T-2 never mentions going in and fighting and then coming back out to do it again in a different timeline. I think if we see the entire series as one coherent timeline as opposed to seeing Chrono Trigger here and Chrono Cross over there, we'd have a much easier time on our hands.
If we do that, and we go with some of the things I've been saying, we can use the following assumptions:
1.) The Guardian was modeled after extensive researching on Lavos. Perhaps the future of mankind thought emulating Lavos and having many Guardians might be able to stop Lavos when he would erupt. In addition, Lavos has been mucking with the genetic material of everything in the planet's history, so some of his abilities might have been transferred in the process. Therefore, other enemies are using their versions of abilities which stem from Lavos' genetic material, meaning they are the ones emulating Lavos, not Lavos emulating them. With Lavos about to erupt, if they accomplished enough research, the future might have been able to create a clone set of Lavos, i.e., the Guardian, and might have been planning to attack Lavos with hundreds or thousands of Guardians (with bits).
2.) If the entire Chronoverse is seen as a whole, both CT and CC together, and not as separates, then by stating that Crono defeats Lavos in 12,000 B.C., we find no need (barring game mechanics and people who make mountains out of molehills) to fight Lavos at different eras. Crono, in the T-2 dimension, begins, continues through, and finally ends the fight with Lavos, killing him in 12,000 B.C.
3.) Lavos exists within our timeline, and not a pocket dimension. Otherwise, when Crono defeats him, he would still erupt in 1999 A.D., causing the same problems, meaning nothing gets solved. If Lavos exists in our timeline, by defeating him, Crono has altered the timeline and therefore prevented the Day of Lavos.
These three assumptions clean up the PD theory problem nicely, in my opinion. The main problems with which the PD theory found its creation were: 1) How is the shell defeated in the past if you defeated it in the future (which of course is a game mechanic that in a living version of the story would not be a feasible idea and is nothing more than a programmer oversight); and 2) How does Lavos "emulate" the Guardian, which exists in 2300 A.D.?
The only question I have is this: We've basically said that each of the main dimensions (we agree there are multi-dimensions out there, but they don't ever touch, and the Chronoverse does not function on a "anything that can happen does" thought) has their own DBT. With the PD theory, we have two main problems that we don't if we nix the PD theory and use the above assumptions.
Problem A: If Lavos is in a separate dimension, then even destroying him won't have an effect. So far, we haven't ruled out DTI (Dimensional Traveler Immunity), meaning Lavos' appearance from the PD would still occur on Keystone. We know this can't be the case.
Problem B: If each dimension has it's own Darkness Beyond Time (DBT), and Lavos' PD, while a adjunct to the Keystone, still fucntions as a separate dimension, then wouldn't both the Keystone and the PD have their own separate DBTs? This would mean that Lavos could not merge with Schala (she fell from Keystone, Lavos from the PD), and that also can't be the case.
If there's no PD, Problem A doesn't occur, as he is part of the timeline and destroying him removes him from the Keystone from that point forward. Same goes for Problem B, as Lavos is in the Keystone timeline and therefore gets junked to the Keystone DBT, along with Schala.
I hope I'm getting this somewhat explainable.