Yea, that is why I posted my thoughts chrono eric. I needed other peoples brains thinking about it and fleshing it out rather than just my own. It wasn't until I posted that I started to realize a couple of flaws and misunderstandings in my own theory...but I still stand by that the PD no longer exists, at least with Lavos in it. (I like to think that Lavos didn't create the PD, but Lavos accessed another dimension, that is more than just a "pocket".) I'll have to review the Time Error theory before I can comment on what you said as I haven't really taken the time to understand it...not to mention it is yet another thing I do not like the name of. But at least we both agree on the main principle of my theory.
I feel almost the same way. I don't think a pocket dimension ever existed for Lavos. If the theory came about to explain the "intact shell" quirk, its just a gameplay quirk. The characters don't stand there and say something like:
Marle: "Wow, he's damaged in this era too!"
Lucca: "Perhaps he generates his own dimension, that would explain it!"
Nope. We are probably not meant to focus on it.
As for the blue background, the only clue we are given is that Lavos's power makes the dimension unstable or creates distortions.
The game gives the impression on several occasions that Lavos is buried deep within the earth, absorbing its power. Perhaps things should have been left at that.
Not trying to be a buzz kill lol, just saying that there is a difference between interpreting and twisting events.
Example - Melchior and Janus vanish despite being safe in the village after Zeal falls.
Interpreting: "Maybe Zeal wanted the gurus gone, regardless of their location. She did banish them prior to this incident."
Twisting: "They vanished because their counterparts, protected by TTI, time travelled at that point."
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@chrono eric: I'm trying to come up with a different idea of how time travel works, based on examples from the game alone. It will be tough, yes, but I think it's worth the trouble. Here is my first rough draft based on a recent playthrough:
Entity Focus: Because time travel is limited to/exists within the planet's memories, standard causal relationships need not apply. To explain further, imagine that the player's view of the game from the outside-in represents the Entity's view or focus. If the the Entity's focus does not rest on a certain era, changes in that era will not produce any change in the Era of Focus (EoF).
Example: EoF = 1000AD. Marle enters 600AD, by some Compendium models 1000AD should be replaced by a new version of 1000AD reflecting the changes made. This does not happen. Instead, Crono, Lucca and all others remain totally unaffected.
Example: EoF = 1000AD. Crono tries to get Moonstone from the greedy mayor. He fails to do so but buys some jerky at the snail stop. Then time travels to...
EoF = 600AD. Crono gives the mayor's ancestor the jerky. He then returns to 1000AD.
EoF = 1000AD. Crono sees that the mayor is now kind and generous.
Now how did I come up with this idea? Easy, the famous Fiona Forest scene. My interpretation of those events is as follows:
While the group is discussing a possible Entity overseeing the adventure, Marle asks Lucca about a time period she would want to travel to. Lucca shys away because she doesn't want to remember. But the planet does remember the incident - and in doing so creates a gate for Lucca to enter. When she changes the past and returns, Robo somehow understands what has happened and comments on how that moment in her life must have been weighing on her mind.
To me, this scene suggests a few things that I believe (for now) may have been intended:
1. The Entity is watching over them.
2. The Entity feels kindness/pity/etc towards them
3. The Entity can, in fact, create gates and to specific time periods.
This ^ led me to believe that the planet may be focusing on the Crono Team during the whole adventure. Of course this is my speculation/fan theory - but it's based upon Robo's comments and I'm trying really hard to gravitate around events in the game and its themes, rather than physics. Hopefully this won't be a bust.