Cheese a battle?

[Demonskeith]

I think for me it was FF 7, several replays into it and found out I could kill the annoying Indian ghost with a phoenix down.

[Ravenfreak]

Another way I like to cheese boss battles is in Legend of Legaia. There's an item called the point card and every time you buy something you earn points. You can use it on any enemy in the game, I like to use the Point Card against Che Delilas, I tend to struggle with that fight and so I save up points until I get to that fight and just use it one turn then use it again and defeat him.