As in a scene with a summon? Or the cutscene that plays when you summon?
If it's the first, then FFIX, Battle of the Iifa Tree, with Bahamut.
For the second, gotta go with Shiva from FFX. I love that intro so much.
A very odd one i will admit but i really like Carbuncle's VIII animation. I love the way he puts his head out slightly before finally coming out of the hole
What do you think?