https://www.youtube.com/watch?v=ya1H82qkOSM
The Vita and PS4 title World of Final Fantasy honors the series legacy in many different ways, with one being a summoning system not unlike past titles. But rather than summoning powerful creatures, you instead summon major Final Fantasy characters like Cloud, Tifa, Tidus and Yuna. You can see all the Champion Summons in the above video recorded by Frokenok3.