I still remember the time when I was playing the game, Omega Weapon took out my party, then, all of the sudden, Phoenix appeared, and yes, resurrected my party (Irvine, Zell, Selphie) -- at the expense of Omega Weapon, gaining +9999 HP.
Another related scenario was when during a similar fight, Gilgamesh appeared, using Masamune; again, giving Omega Weapon + 9999 HP.
Lastly, the scenario I fear the most was Gilgamesh, showing up in the boss fight VS Adel.
Ok, let's discuss...