I'm going to jump back into this.
Blant point - Crono a has died before. Because he has died, it means he is not immortal or can't die from anything. Lavos did him in good, and that was a fraction of his power.
Yeah, Lavos killed Crono. You don't know what amount of his power he used agianst him was. Don't present assumtions as fact. And we know for a fact that that was only a fraction of Crono's power, as he later comes back and kills Lavos.
But that's not the point. Because Lucca did die to Lynx, and Lynx (in your opinion) should no way be near enough to kill her since he's just a body with the look of a cat etc., then really, explain why she could not kill him in her house? She knew the fire had started, and was beaten by Lynx and Harle. Kid then rushed into the room just intime for Lucca to be teleported away.
I've said this in the past, but here are factors that may have contributed to Lucca being defeated.
1.) She uses fire magic. What good is that going to do in a burning house? Make it worse.
2.) Little orphans running around in a blaze, orphans that she cares about, would be a big distraction in fighting.
3.) What weapon did Lucca use? Physical strength? No. Guns. Its not a huge assumtion to say that maybe she wasn't carrying one when Lynx attacked.
4.) She obviously wasn't wearing her armor.
I myself believe their powers would have weakened over time.
1) The entity wouldn't allow people to be all powerful since they might go against the entity, or make themselves Gods.
2) As Spekkio said, magic was lost overtime etc. etc.
3) If you don't use magic, like anything else, for a long period of time - it gets rusty.
1.) The entity doesn't have control over how powerful people get. If it did, it would have done something about Lavos's power.
2.) Wrong. Spekkio said:
But in time, people
began to abuse their powers. It got so bad that no one was allowed to use
magic except wizards.
He said no one was allowed to use it, so it wasn't taught anymore, and only Wizards were allowed to use it.
3.) Who says that Crono didn't stay in practice? Plus, the Fall of Guardia happend only 5 years after CT's 1000ad. Really, thats really not a long enough time for Crono to get so out of practice that he would forget all his magic, loose his strength and speed, etc etc. Lessened? Maybe. But then agian, who says that Crono didn't keep his strength up, and keep training, etc etc.
But since you think that didn't happen, and that they're almost omnipotent, you still can't explain why Crono died and Lucca can die. Robo may not have a body, but he was still deleted.
Who says they are omnipotent? Just because a person is incredably strong, just because someone is one of the most powerful beings in history, does not make someone invinsible.
Crono died? Are you talking about in Zeal?
Lucca died: See above.
Robo dieing: ...
Crono and co are able to be killed. But at the level they are at, they could not be killed by weaklings. It would take another powerful being to defeat them.