None.
There are no cheats for any Final Fantasy game
no
no no no
Doubt it.
there aren't any cheats, sorry.
hehe nope :P
Not without a game shark or some sort of thing like that.
sort of, in final fantasy 1 and 2 you can play a secret mini game by riding "a" sled and pressing a 50 times or something.. (please fix this answer, just a little off)
NO
Yes.
no it is either start over, or go on without him.
The newest Final Fantasy VII game is Crisis Core: Final Fantasy VII for the PSP.