Hm....

FFII: Ultima Tower.

FFIV: Everyone Returns to fight the Giant of Babil

FFVII: Sapphire Weapon attacks Junon or Cloud removing his helmet to show that he was actually there five years ago in Nibelheim and was the one who defeated Sephiroth

FFVIII: Balamb vs. Galbadia Garden

FFIX: Entering Memoria/Silver Dragons vs. Alexandria and Lindblum

FFX: Defying Yunalesca

FFX-2: 1000 Words Concert

FFXII: Everything at the top of the Pharos

FFXIII: Eden Under Siege or meeting with Barthandelus

FFXIII-2: Noel's Dream in A Dying World