[General Discussion] Favorite Boss Fights

I'll have to go with the Dominia/Kelvena boss fight in Xenogears. What made it specifically memorable for me is that it's a very fair fight. 2-on-2, equal strength, equal ability. I remember the first time I ever fought them, I had around 500 fuel each, and less than 1000 HP, both due to not knowing what was ahead, and I was murdalized unmercifully. On top of that, I had neglected to give Elly a Flare Rod. I had to laugh at how horribly I was dismantled. Nowadays whenever I give XG another runthrough, I know exactly what to do, making the battle far more enjoyable.

Jam it back in, in the dark.