>>65118398> Can an Infernal Exalt learn to do this thing from a completely different setting where things work completely differently
That said, as an Exalted newfag, I hear some parts are pretty freeform and bullshit so you can probably emulate stuff. It wouldn't be the same, though. It would be its own thing.> am I correct that Keychains in Kingdom Hearts only give different stats apart from the aesthetics?
Yes.> Is it possible to find some with infinite strength
No, that's way outside the keyblade power scale, especially if you're using Top's rules to find keychains as you progress normally.
If you threw enough jumper science at the wall you could maybe make one, but you could just as easily make a normal sword that does that.
I don't know where you'd need to start to do that. I'm sure someone else would have an idea.