YEAHHHH rage of the dragons!
2001
the year of 2001 has got to be
CAPCOM VERSUS SNK 2
MILLIONAIRE FIGHTING 2001

The ultimate mashup fighter from the ultimate fighting game companies, a game in which justin wong destroyed me on an arcade cabinet without looking at the screen, a game in which JOE was fantastic no matter what anybody says, one of the most enjoyable and goofy fighting games of all time, and those special intros!! 2001!!!!!
(there are way too many good games in 2001, it is a year when the dreamcast still existed and hope was still alive, which is why I stated this so definitively despite there being so many choices)