I'm working on a Final Fantasy 3 hack, and I'd like to make the Clear (Vanish) and Float statii go away at the end of battle.  Anyone know how to accomplish this?  Any help is appreciated.

If there are other statuses that time out at the end of battle, you could check to see when they get cleared. That should put you right where you want to hook in your changes.

Assuming what you see is jibberish, do the following:

Go to C2/495A (0x2495A in the rom, add 0x200 if your rom has a header. If you use FF3usMe, then your rom does) and change the 29 C0 to 29 40. That takes care of Float. Removing Vanish will require writing a new routine, since I can't seem to find if/where Magitek status is handled. At the LDA $3EE4,X (BD E4 3E) you'll need to insert 20 yy xx (JSR $xxyy). Find some free space in the bank (C2/6469-C2/6800 should have a bunch of free space, indicated by 0xFF) and make your JSR look there. At the new location, do the following:

BD E4 3E 29 EF 60
That translates to LDA $3EE4,X, AND #$EF, RTS which will take care of Vanish.

Helpful tip, JSR's don't know what headers are, so your JSR should be -0x200 whatever your location is (assuming your rom has a header). Any questions, feel free to ask.