Dead Fantasy
 

Joxer's comment reminded me of this action gem from Monty Oum. Unfortunately, Monty died about a year ago so I'm afraid we'll never see the end of the story (such as it is).

Basically, the Final Fantasy girls and the Dead or Alive girls get into a fight. And they fight. And they fight. And they fight a lot more. Some story starts to bleed in around part 3… but it's still mostly fighting.

Part 1


Part 2 (proof you can drink a heal potion in pitched, hand-to-hand battle)


Part 3


Part 4


Part 5


And a little bonus from an earlier work showing Master Chief from Halo fighting Samus from Metroid. See Master Chief's true identity!
Haloid

Monty was with CGI action coreography what's Iko Uwais in movies today.
Unlike Nintendo dictator and some other business cash_ins that died and were mentioned on this site, Monty was a true artist who created stuff with love and passion, not to earn billions on suckers.

Monty, I miss you.