I'm at Ultimecia's castle right now, and I've just defeated Omega Weapon. I did like 12 Limit Breaks with Riona, and all of them were Angelo Cannon. And before I could see a Wishing Star, Omega died under my other 2 characters Limit Break. Thinking it was Aura's fault(Cause my hp were full), I brought down Riona's hp to 1200/9999 and walked around to battle random enimies. And out of like 30-40times, I still haven't seen her perform 1 wishing star. Out of the 30-40, I've only performed 2 invincible moon. I've already learnt wishing star, but I skipped skills like Angelo Strike and Angelo Recover. My question is, do I need to learn all the skills for Wishing Star to be able to be used? If not, what are the chances of Riona using Wishing Star?