I give props to whoever at Mugen put effort into the Animations of Dante & Vergil's Mugen Sprites. They look pretty damn fluid for 2d and it doesnt look like they had to alter another sprite just to make them.
http://youtu.be/e3fb0LYqS2U
(And before you ask they also made a Nero Sprite too.)
http://youtu.be/R046GdV8opM
http://youtu.be/e3fb0LYqS2U
(And before you ask they also made a Nero Sprite too.)
http://youtu.be/R046GdV8opM