And you know, I'm pretty sure there was a message that popped up on screen that told you to Summon/Banish Ruin press L1+R1, and you know where else it says? In the instruction booklet. I know this cause I just got him this morning. . .It's like you're not even trying and need your hand held.
I like being helpful and all but like I said, it POPS up on screen, how to summon/banish him yet you still had to run to the comp and ask the question, hell. . .if you press select, go to the last tab one the menu, and scroll down you woulda got your answer quicker and with no snippyness to boot. . .