Final Fantasy XIII
Some one please help!
search for this one: Final Fantasy XIII Piggyback Complete Official Guide.pdf
If you press RT (Top right button, where R1 is on a PS controller) you will be shown a scan of the Eidolon. Here it will show you what will make it yield, for example when you battled Odin the second thing was to heal Hope. Remember that halfway through a second task will appear, check for it and do that repeatedly.