I never see anyone mention the way to get Economizers for your entire party in the U.S. cartridge version of Final Fantasy III (6). It's odd, because it's really easy too. You just find the Brachiasaur and either have someone use the Esper which turns monsters into items or have Locke steal from it. It's random when it works, so you have to have patience, but it does work.

And Kefka is a total pussy when everyone in your party can cast Ultima for 1 MP.

I was also probably the first to discover that if you pressed a direction on controller 2 during the opening movie to Shining Force CD that it would play the opening dialogue in Japanese. It took over a year before gaming magazines started listing the trick I discovered on the release date of the game.