Armor-Piercing Slap: Hitomi delivers one at the end of Part V. Somehow without even making physical contact (though that was likely an animation oversight).
From Part III onward there is a visible jump in polygon count, facial expressions and realism of movement.
Here's a preview of Part VI for comparison. It's probably not even the final version of that scene.
And on a wider scale, Dead Fantasy as a whole is the pinnacle achievement of Monty Oum's art, which started with photo manipulation.
Autobots, Rock Out!: At the end of Part II, the electric guitars cut in as Rinoa gets the teleportation spell going.
Awesome, but Impractical: Even if it is possible with the circular guards, attaching daggers to your feet seems somewhat counterproductive.
Badass Boast: Not the characters, since they don't talk (yet), but the author declaring "You haven't seen anything yet" at the end of Part II has to count for something.
Badass Normal: Hitomi is the only one so far who doesn't use her own magic. She makes up for it with enough Charles Atlas Superpower to throw chunks of building around.
Horribly, HORRIBLY averted in Part V, which is like a fight scene out of Kill Bill.
Big Damn Heroes: In order of appearance - Rikku, Hitomi, Tifa, Rinoa, Cloud, and Hayabusa. It's gotten to the point where only one fight so far had a definite winner, because nobody showed up to interfere.
Bloodier and Gorier: The first four parts are relatively light-hearted compared to Part V. Before that Monty Oum made a point that "the girls were having fun", in a sort of supernatural badass training exercise, by animating their faces rather light-hearted. We're pretty sure that Tifa stopped having fun when she became a human pincushion.
Bottomless Magazines: We don't see her load new clips, but every so often a distinctive lock and load sound is heard between her barrages, coupled with an animation of Yuna sliding both guns near her hips for a brief moment. Her Gun Magic attacks, on the other hand...
Bullet Hell: Several of Yuna's special moves invoke this.
Cast Herd: The five portals Rinoa opens at the end of Part II serve to pair up characters with their designated opponents (see Mass Teleportation below), and also divide the cast up into manageable groups:
Tifa vs. Hitomi, the only fight we've seen more or less resolved so far, with the addition of Hayate, his ninja mooks, and Helena.
Yuna vs. Kasumi, with Yuna's Aeons, an army of Kasumi clones, Cloud, Hayabusa and Momiji.
Rikku vs. Ayane. Promo shots suggest that they'll be fighting in some kind of underground base.
Kairi goes for Rachel, but when Rachel eludes her, she ends up by herself. The WIP footage from part VIII shows her transforming into Naminé to go up against Hayabusa and Momiji, with an assist from Vincent Valentine.
Rinoa vs. Rachel. We don't know much about what will happen to them, except for a shot of Rachel in chains.
Cat Fight: Used to have an all female cast until Fan Girls demanded Cloud.
Chain Pain: The ninjas in Part V attempt to subdue Tifa with chains.
Charles Atlas Superpower: Hitomi again. Everyone else has blatant superpowers, either through Materia or ninjutsu, whereas Hitomi is just very strong, very fast, and really, REALLY good at fighting. Good enough to outfight Tifa, who was loaded up with Materia and pretty clearly portrayed as the second most powerful combatant in Part II after Rinoa, using nothing but Wing Chun.
Cherry Blossoms: Kasumi's motif, appearing whenever she teleports.
Deconstructed in Part V, where individual ninja mooks go down like tenpins, but enough of them can push Tifa to her limits far more than any single fighter we've seen. Judging by what little we see of Kasumi's fight it went down in a similar way.
Diving Save: Rikku pushes Yuna out of the way of a flying block in Part I.
Do Not Touch the Funnel Cloud: The tornado doesn't seem to affect the fighters at all unless they actually touch the funnel cloud. Of course, since they're apparently made of indestructium, all the funnel cloud does is pick them up for some cool midair fight scenes.
While no match for him, Tifa can apparently do a split kick and a jump kick almost simultaneously.
Rikku does some after Tifa casts Hastega.
Foe Tossing Charge: Tifa, while on a platform, literally picks up one of the ninja standing between her and her target and hurls the poor Mook over the railing. Three more try to restrain her with chains and get tossed around like ragdolls.
Gun Fu: Yuna's main combat style, when not using magic.
Half the Man He Used to Be: Tifa cuts two ninja in half in Part V, using both the vertical and horizontal varieties.
Hammerspace: Where Yuna keeps her ether bottles in Part II.
How Much More Can She Take: EVERYONE. Getting shot in the head at point blank or hit by an axe, which can cut buildings in half. No problem! Tifa is a particularly egregious example.
Hyperspace Arsenal: Where the girls keep their weapons when they need to grab something.
All of Yuna's Aeons. (The ones she summoned, anyways. She never got around to summoning Anima, Yojimbo, or The Magus Sisters.)
Rinoa's using her Angel Wings Limit break making for huge spell action, and then uses her Wishing Star Limit Break on the entire other side inside of a tornado, which she created also.
Justified, since characters are constantly fighting. Part II and Part IV introduce temporary costume changes, using Drive Forms and Dress Spheres respectively.
Everyone in the music videos gets alternative outfits, mostly Hotter and Sexier ones.
More Dakka: Yuna demonstrates this after Tifa casts Haste on the FF team during Part II.
Ninja: The entire DOA team, minus Hitomi. And Helena, if she ever fights.
No Flow in CGI: Surprisingly averted, especially considering it's an amateur production.
Tifa's outfit in V, in particular, ripples fairly realistically in the wind and as she moves.
And taken to its logical extreme with Kasumi's skirt in the Music Video, to the point where it's moving too much to look like real fabric. This directly leads to numerous Panty Shots.
One-Man Army: Tifa in Part V, and this is while bleeding from multiple wounds and suffering more as she goes.
Only a Flesh Wound: Tifa takes several sword cuts with visible blood sprays in part V and isn't slowed down in the slightest and even after having a sword stuck through the upper arm, is still able to use that arm just fine. And then there are the arrows.
Panty Shot: Several, though some have to be freeze-framed to be seen.
Interestingly, even though we got a quick upskirt just shortly beforehand, Kairi in one obvious frame doesn't have any underwear on. Possibly an animation slip-up, possibly not.
Popularity Power: The DOA team suddenly being able to go toe-to-toe vs. fully-levelled Final Fantasy characters is a subversion, since if you go by fandom backing Team Final Fantasy should be winning by a landslide (and they kind of do during most of Part II). In Part V's live screening you can hear everyone cheering for Tifa and quite a few people wondering who Hayate is.
Power Creep, Power Seep: Practically everyone got some upgrade to their powers compared to their canon selves, some more than others. The Dead or Alive fighters in particular, given that they go from barely using any ninja magic in the games to being full fledged combat wizards.
The newest Dead Or Alive game seems to be putting their strengths close to the power shown in Ninja Gaiden where they are full fledged combat wizards. So either Monty is gonna have to up the ante or this trope is gonna be averted.
Naminé has keyblade wings with very versatile applications as seen in this preview for DFVIII. (spoilers for newly introduced characters)
Punched Across the Room: And kicked, and thrown, and blasted. Tifa and Hitomi even perform double knockdowns on each other this way. The laws of physics must be out to lunch. Or they're too busy watching.
Rapid Fire Fisticuffs: Tifa pulls off a few kick versions of this in Part II. Hastega is a glorious thing.
Second Hour Superpower: Hitomi being able to punch the materia out of Tifa at the end of their fight, but not at the beginning. Why can she USE said materia immediately, even though Tifa was the only one with any? Anyone's guess.
Set Swords to Stun: Almost everyone is being blasted in the face with magic. How are they still standing exactly?
Tifa, when holding a pipe as weapon, using at least one move from Kilik.
In Part III, there is a shot of Tifa standing all badass with a wall of fire behind her. 9 out of 10 viewers will immediately remember Sephiroth as he appeared in Advent Children.
In the same video, Tifa and Hitomi do a slow-motion simultaneous punch, which is exactly like - even in camera angle - the one Jin and Kazuya pulled on a trailer for Tekken 6.
Keeping with the Tekken references, Yuna uses a couple of Lili's moves in Part II.
The opening sequences for Parts III and IV are shout outs to the ones from FFVII and FFVIII. IV's is also a shout out to Kingdom Hearts II.
In Part V Tifa takes a page out of Cloud's book and while being surrounded jumps onto a passing train.
In part II, Hitomi almost perfectly emulates Daigo's epic tournament victory from Third Strike against a hasted Tifa. Even the "parrying" sound effect is used (but instead of comboing into the win after parrying Tifa's attacks, Hitomi gets flipkicked in the face, and eats a Final Heaven shortly afterwards).
In Part III, right after the rather lengthy opening credits "When Angels Cry" comes up on the screen as the soundtrack from Devil May Cry 3 starts.
Based on what little we've seen of Naminé in previews and promotional stuff, it looks like she's gonna be borrowing some moves from Nu-13. The ending of the preview, complete with Vincent Valentine beside her, makes it look like she's channeling Xehanort from Kingdom Hearts: Birth by Sleep.
Ayane's ninjutsu, particularly when she does a series of hand signs before smashing the tower, borrows the "jutsu use" sound effect from Naruto.
Soft Glass: Tifa just smashes through a window at full speed and keeps on going. Mind you, this is Tifa we're talking about.
Spin Attack: Valor Form Kairi seems to be aping Roxas's fighting style as well as his twin keyblades.
Spin to Deflect Stuff: Ayane can block bullets with her double sword Genra without even holding it.
Squee: Admit it, YOU probably did when you first watched these.
A rare male example, usually with the appearance of a new fighter. Tifa!
More like stepping stones in the middle of a friggin' tornado.
Tifa also uses the Dead or Alive fighters as time frozen stepping stones to climb high enough to knock them all into position for Rikku's tackle attack.
Stepping Stone Sword: Rachel perches on her hammer while waiting for the fight to fall to her.
Summon Magic: Yuna pulls out her old Summoner garbs to fight the Kasumi clones. Sadly, the Aeons weren't a match for the Teleport SpamZerg Rush tactics the clones employed.
Sword Pointing: Rinoa does this toward her opponents in Part II.
Theme Music Power-Up: A side effect of the fact that Monty actually builds his movies around the songs and not vice versa. The biggest comes in Part V - right after Tifa's flashback, the gentle music suddenly jolts back to life, and Tifa goes on a bloody rampage.
Rinoa was already fairly powerful in Final Fantasy VIII, being a Sorceress and all, but she was still just a powerful spellcaster. In Part II, though she goes full-on Valkyrie, complete with sword, shield, and wings.
Train Escape: Tifa does it in the beginning of Part V.
Victory By Endurance: Hayate adopts this tactic in Dead Fantasy V, by having his ninja assault Tifa after she's been beaten and severely weakened by Hitomi. Hayate doesn't attack until she's on the brink of exhuastion; having expended her remaining energy dispatching all but two of his squad.
We Have Reserves: A possible explanation for why Hayate lets his ninja fight against Tifa, dying in the dozens, eventually weighing her down with numbers. And he does that in spite of the fact that he can down her at pretty much any time he wants.
Ninja rule in the universe is if you can't defend yourself in battle you die. Ryu kills and can be killed in training missions in Ninja Gaiden.
Worthy Opponent: Possibly Hitomi and Tifa. Supported by one interpretation of Hitomi slapping Hayate after he and his ninja Zerg Rush absolutely brutalize Tifa.
Your Eyes Can Deceive You: After getting hit with Tifa's Darkness spell in Part III, Hitomi gets right back up and starts fighting blind. And winning.