Boss Fight!!!

[Wootem Ace]

I have a question that could actually go here, so rather than start a new thread, I'll just post it here. I haven't played EP 2 in a while (since before my mem card corrupted) and I was fighting the Gol Dragon on V.Hard w/ my one char and got kinda scared when I saw three of him, and that I could attack all three. What are you supposed to do when this happens? Do you have to beat them all?