How can you boost GFs?

All elemental GF have the boost ability, some have already learned it, but for most, you need to put it on the learn list. After they learn it, when you call upon them, as they are going through their "cut-scene", you rapidly press the square button. This boosts their power from 75 - 250% - depending on which GF you use. But, watch for the square symbol to disappear during the "cut-scene"...if it disappears, and you press it, your boost power will return to 75%, and if you have the time, you will have to start over.

Right you go on the menu and go onGF then press "learn" and boost up what you want it 2 learn it will take a while 4 them to learn it and you're GF will go up levels and and get high stregth and that hope I did help a bit I only just started!!!

Have your GF's learn the boost ability(10 ap). Then when you summon them in battle, hold the select button down and press square button as many times as you can. Don't press it while the X is there or you'll have to start boosting again.

All you need to do is have the boost ability and press select when your using them and tap x rapidly, stop when it turns red or you'll lose all your boost.