Can you save after you beat the game?

Not sure why I would really want to go back, but incase I do, I won't go all out without a care in the world. I have, like, 25,000 gil and have never bought anything. I haven't taken apart any weapons and I haven't really paid attention to upgrading.

If the last boss...es (I almost forgot this is a JRPG) are as easy as the last bird-machine creature I fought, I might not even bother. I just stopped upgrading abilities. I don't have Thundaga or any of that stuff, but I did get Haste.

To reiterate: Can you save after you beat the game? I'm guessing no, but I want to make sure.

Yes you can.
That save data will get you back before the last battle but with the crystarium fully expanded.
Which means you can get back to Gran Pulse and Edenhall ONLY.

I like the idea of going back on a side note....though this was something I had already seen on Breath of Fire 3