Quote Originally Posted by Draupnir2005
I used the end on the final form of Ultimacia and it did not work! YOU LIE! LIES!
It doesn't defeat her completely, but it allows you to skip all the fighting up to the point where she says, "Reflect on your childhood...", so basically you can avoid quite a drawn-out battle, depending on how strong your team is. Once you use The End in this fight, she'll be gone in only a few hits.