A/N: I was going to make this a one-shot, but I changed my mind. *Sunglasses* Deal with it.
Properties belong to the owners of MLP:FiM, Death Battle, Kingdom Hearts (Hasbro, Screw Attack, and Square Enix respectively).
The Death Battle intro theme plays as our hosts prepare to present another match up for our lovely audience. How we didn't get fired for not ending in a death last time is beyond m-... what's that? We're starting? Oh, sorry.
B is enthusiastic, "Eat your heart out, werewolves, because we found some guys that love to hog the moon light more than you do."
W adds, "Like Nightmare Moon, the Mare in the Moon."
"And Saix, the Luna Diviner. He's W and I'm B."
"And it's our job to analyze their weapons, armor, and skills to find out who would win a Death Battle."
Some expertly drawn art of the first combatant shows itself after the title card while W iterates.
"Nightmare Moon is the embodiment of jealousy and hatred fused with Princess Luna, the Night Princess of Equestria."
B interjects, "Wait, wait, wait... that's a pony for little girls to play with? Since when are ponies allowed to look bad*ss?"
W continues as if he didn't hear, "After being imprisoned in the moon for one thousand years by Princess Celestia and the Elements of Harmony, Nightmare Moon swore vengeance and vowed to bring about eternal night."
"Without a sun's energy, a planet would eventually die," B realizes, "Man, slow and painful death is kind of dark for a kid's show."
A stat screen appears describing Nightmare Moon as W's exposition carries on.
"Being fused with Princess Luna, Nightmare has access to all of her alicorn powers including flight, strength, and magic. Her most common magic is lightning."
"The Mare in the Moon can transform herself into a living shadow which can somehow split solid rock, deform trees, create shadow clones, form black tornadoes, and... cut mustaches? Really?" B asks in disbelief. One can only assume his eye brow was raised since he's never on screen.
At this point a clip shows Steven Magnet the sea serpent saying, "What a world! What a world!"
W takes the pause as another chance to talk, "She also wears a midnight blue breastplate and helmet which not only block physical blows to those regions but also block out words of reason. However, heroic monologue can give her pause."
A clip shows about 10 seconds of Twilight Sparkle's speech about the Elements of Harmony with Nightmare Moon literally standing stock still.
B then inserts an out of place question, "When did Maleficent become a pony?"
Nightmare Moon laughs in the last clip of her, "The night... will last... FOREVER! Ah ha ha ha ha ha ha!"
The title card parts to reveal a blue-haired man wearing a black overcoat with unnecessary zippers.
With that visual W takes the lead again, "Saix is number 7 of Organization XIII, and is known in Japan as the 'Demon Dancing in the Moon'."
B tries a pun, "Heh, the man in the moon sure gets a lot of party guests."
W strategically ignores him, "Saix is a creature known as a Nobody, an empty shell left behind when a strong-willed heart is lost to the Darkness. He still has his memories as Isa before losing his heart, yet his real emotions are now out of reach."
"So... he's an emo."
"He wears the black coat of the Organization, which protects him from being absorbed by Darkness when traveling through the Dark Corridors between worlds."
"Yep. He's an emo."
A detailed image of Saix's weapon appears onscreen.
"Saix wields a claymore, a Scottish variant of the late medieval two-handed longsword. Yet, his seems to more resemble a war hammer given it's wider attack range and power. He can draw more power by calling on energy from moon light. By doing so, he enters 'Berserk' mode which allows him to ignore pain and release blue pillars of flame to destroy his enemies."
"An emo in need of anger management."
"Although he commands lesser Nobodies and gives orders to other members of the Organization, Saix is still willing to take orders from the leader, Xemnas."
"Ah ha ha ha ha ha!"
"That name. That anagram. M-A-N-S-E... Ha ha ha ha ha...!" B can't contain himself.
"Oh..." W shakes his head at B's immaturity.
A clip of Saix fills up the moment of silence with, "Different name, same fate."
W says his usual phrase, "All right, the combatants are set. Let's end this debate once and for all."
"Let's have a Death Battle!" B shouts.
The stage this time is one that closely resembles one of the empty halls of The Castle That Never Was. A shadow reforms into the alicorn Nightmare Moon before a Corridor of Darkness appears to reveal Saix, claymore already in hand. It seems neither is willing to make a witty opening statement.
The red message appears, "FIGHT!" and then disappears.
Saix gets ready to gather energy from the moon light shining through the glass ceiling. As he does so he asks, "Do you feel it? The moon's power!" He starts levitating as he shouts, "Moon, shine down!" He lets out a humane roar before striking the ground rapidly, which shakes the ground and forms tall walls of blue flame. His assault doesn't seem to be working since Nightmare Moon is flying just out of the flames' range.
Taking advantage of his poor aim, Nightmare Moon fires several lightning bolts at Saix. They don't seem to be having much of an effect on Saix's health or his rage attacks. Barely dodging one of his swings, Nightmare Moon tries for a melee approach by transforming into a dark look-alike to Saix's claymore before bashing him with clockwise motions. This has more of a result as Saix vocally and physically flinches with each hit. His 'Berserk' mode is broken as he falls to the ground stunned. Nightmare Moon morphs back into her alicorn form.
"I misjudged you," Saix mutters.
"Foal! The moon's power belongs to me!" Nightmare Moon shouts as her dark mist of a mane swirls around herself. She transforms and splits into three Pegasi that look kind of like the Wonderbolts, only darker and sinister. With these clones she flies past Saix for multiple quick strikes. Saix manages to use his claymore to knock one of them away only to have the other two hit him again.
"I will leave you with nothing!" he shouts as his claymore knocks a second clone to the ground.
"We shall see about that," the third clone remarks as it pulls in the other two clones. They change back into a single living shadow before it resumes Nightmare's default form. As the minutes have passed, Saix gains enough power to restore his 'Berserk' mode.
"Moon, shine down!" he yells.
"I don't think so!" she retorts as she gallops in close while delivering a lightning-charged horn attack just as Saix slams his claymore down. A bright bluish-white light fills the screen obscuring the vision of the viewers.
The light clears.
The screen reveals a worn out Princess Luna, free from the Nightmare and Saix slowly evaporating.
"Kingdom Hearts, why won't you give me my heart?" he stares at the valentine-shaped moon in the sky before he collapses and disappears completely.
Princess Luna wakes up slightly dazed, "What? Where art we?"
A red message, "K.O.!" appears before the title card shows up.
"Dang," says B, "Some Keyblade wielder's going to be pretty steamed when he finds out a pony did his job better than him."
"I don't know B," differs W, "Saix was able to wear Nightmare to the point where she couldn't hold her host anymore."
Stat screens appear to explain why the result is what it is.
"His fire pillars did force her into the defensive," W continues, "But ultimately, Nightmare's shape-shifting and strategy left Saix without a backup plan. And unlike Saix who was a body without emotions, Nightmare is an emotion without a body, meaning there's no telling when she'll be back."
"Looks like Saix is ax," B tries an anagram... unsuccessfully, "Get it?"
"The winner is Nightmare Moon," declares W.
"Got an idea for a Death Battle? Leave a comment below."
"And don't forget to like. Thanks for watching."
A/N: Now I'm positive I'm out of ideas for this kind of thing. Thank you all for liking the first chapter so much. Don't sue me because I literally gain no profit from this. (I regret writing a terrible sequel chapter.)