Final Fantasy naming rundown, to head off any potential naming confusion.
FF1, FF2, and FF3 were on the original Famicom (Japanese NES). Nintendo translated and published the first one, but didn't want to translate 2&3, which caused some later complaints and accusations. Oddly, at one point Square re-released FF1&2 in Japan on the same Famicom cart.
FF4, FF5, and FF6 were on the Super Famicom (SNES). Square brought over FF4 as "FF2", skipped FF5, and brought over FF6 as "FF3".
The general concensus seems to be that when specifically referring to the American SNES games, you should call them "2&3", but clarify that you're deliberately using their original "American SNES" names. Also, the "real" FF2&3 are rightly called "FF2&3", but it's a good idea to call them "FF2j" and "FF3j" to avoid confusion.
FF7 to FF9 were on the PSOne, yadda yadda yadda, you know the rest. BTW, it's "proper" to use roman numerals with FF names, but ordinary "numbers" are usually easier and quicker to understand.
Square re-released ports of FF4 to 6 (and Chrono Trigger) on the PSOne. They mostly just suffered by the move to the CD format, and bugs in the porting led to FF4 being released after the other two games in America.
Square "remade" FF1 and FF2j on the Wonderswan Color (a console initially designed by the late Gunpei Yokoi, and roughly comparable in power and design philosophy to the simultaneously-developed GameBoy Color, which had also employed Yokoi as a freelance consultant). Square had intended to remake FF1 through FF3j on the WSC, as well as rumors about remakes of Seiken Densetsu (later remade on the GBA as "Sword of Mana") and the "SaGa" games that appeared in America as the Final Fantasy Legends series. An "unknown mystery problem" prevented Square from remaking FF3j on the WSC. So they decided to shoehorn FF4 onto the WSC in it's place, and the results convinced Square's president to reconcile with Nintendo, to get access to the GBA.
Then Square "re-remade" the WSC versions of FF1 and FF2j for the PSOne, which puzzled many, as Square had eventually gotten things cleared up with Nintendo. As full-on "re-remakes", they seemed to suffer less from being on the CD format than FF4 to FF6 did (IMO).
Now those two seem to be getting "re-remade" from the WSC versions again, on the GBA, and in one cart. The ports of FF4 to 6 were all on self-contained disks, but packaged together, while the three WSC games were all sold-seperately, and the PSone versions of 1&2 were on the same disk.
FF2j and FF3j for the Famicom, and FF5 for the Super Famicom, all have walkthroughs and fan-translations abundandly available on the internet, in case you'd like to import. If you see any "prototype" carts of these games on eBay, they're 100% BOGUS. Don't fall for them.