Gilgamesh is a combination of Ultros and Goku, and that's OK with me.
All he wants to do is fight -- so much so that he'll follow you into different games after being sucked into a dimensional portal. It is this tasteful repetition, not unlike our octopus friend from earlier, that makes Gilgamesh so memorable. However, what really lands him on the list is the fight in Final Fantasy XIII-2.
Gilgamesh being back, with yet another new arrangement of his theme song Pokey's March style, and ready to get right into it with you and the party. But this battle isn't just another fun but silly fight with Gilgamesh; it's a celebration of the character and the series as a whole. He comes equipped with famous swords from the Final Fantasy series, fourth wall breaks and references galore.
Gilgamesh has been with the series since Final Fantasy V, and to see such a lovingly crafted fight for him shows a real level of reverence for how far Final Fantasy has come since then. This is Final Fantasy's Liquid Ocelot v. Snake.