A longshot, but this is all I got.

FFIIj's leveling up in-game cheat.

I stand alone not like the rest, (FFIIj has a strange way of leveling up compared to other games)
Now many think I am a pest, (It's hands down the hardest game in the series)
They say just fighting would be best, (The normal way to get exp)
But it's not just strength that I will test. (The trick utilizes knowledge of the battle mechanics)
To use me right is kinda 'sketch'y, (It is a cheat, which is sketchy... can't explain why 'sketch' is quoted)
But great power I will fetch ye. (It really soups you up good)
No orbs in sight to help you grow, (Not FFX here)
You see I'm not just balls you know (Can't make much out of this)