My big sis taught me this, but I'm still not pretty sure myself yet....here I go! Okay. Next to the picture of each member in your party, there is a number. It's right in front of a red bar, that fills up gradually with each turn. When it reaches 1 or beyond, you can press R1 and the Boost button for that character, and they'll get their turn really quick. I don't really remember the buttons....let's say that you've got Ziggy, chaos and MOMO fighting, and Ziggy's pic is first in line on the top of the screen. If Ziggy's bar reaches 1, then press R1, and then the Square button.....i think...maybe someone else can help you with the corresponding buttons....