Pretty solid port for the time, has 2 player co-op unlike the NES port and it feels close enough to the arcade version, there is quite a lot of flickering and slow down and the enemy AI is very dumb and exploitable but overall not bad.
There's some good mechanics here that are let down by a truly awful roster, terrible presentation and just the fact it's a shitty asset-flip of UMVC3 which was a much better game in every regard.
It has a solid foundation but ultimately ends up bloated and padded out, fine on a regular playthrough if not a little annoying with the trial-and-error difficulty but they absolutely ruined the 100% which is a huge part of what made the originals so good and rewarding to finish.
Even if it is just a stripped down port of Dracula X Chronicles without the 3D remake of Rondo of Blood, it's still a collection of two of the best games of all time. Had a blast getting the platinum trophy.