Breath of Fire IV - Levelling with Bots for Fun and Profit

Full credit for this trick goes to the maker of this video; I'd never heard of it before.

In short, what you need to do is go to Sinchon and find some Bots. You can do this at any point after reaching Sinchon; I waited until I was able to apprentice all my characters to Bunyan. He increases all stats while decreasing the amount that HP and AP rises by each level.  After a couple of levels with him, I'll switch to Marlok to bring the HP and AP back up.  Remember that Masters don't decrease your stats; they just decrease or increase the amount that they rise by upon levelling. 

Anyway, you've found some bots.  Great!  Ideally, you want to be attacked by at least two or three, rather than one.

1. Hit them with a weak wind + water combo.  I gave Eddy to Ershin, and used that and Scias' Frost to create the combo.  Finish by having Nina heal whichever bot you focused the attacks on.
2. Use Nina and Scias to heal the other two Bots.  If you're facing two bots rather than three, just have Nina heal.  3rd character guards.
3. Everyone guards.
4. Rinse & repeat.  The bots will recover at the start of this turn, so your attacks will just break their bodies open again.

Every time you break the Bots open, their exp will double, to a maximum of 65535.  Have fun!