Both have their best keyblades, whatever magic/items/abilities/forms they can use from their respective games, etc
The arena is the same as the first Xemnas fight, in front of the clock tower.
The "they share a heart" thing is cancelled out, just in case it affects the fight in some way. I don't see how it can, but you never know.
Who takes the keyblade crown?
Also - call this a 2nd round, if you will, but which one can do the 1000 heartless run the quickest?
Gender: Male Location: When I said location, I ment Novel
I looks like a fusion of Kingdom Key+Ultima Weapon+Dream Sword=X-Blade
made up of two crossing Kingdom Keys, with the teeth facing outward. It has a filigree that slightly resembles one on the Ultima Weapon, and the blade slightly resembles the Dream Sword.