While the gameplay was typical of the Marvel vs. Capcom series, Marvel vs. Capcom is distinguishable by two features: the ability to summon assist characters, and the Duo Team Attack.
Unlike the later games in the series, the point character of a Marvel vs. Capcom team could not summon the offscreen partner for an assist attack; instead, an assist character was randomly selected before the match began. This character could be summoned a limited number of times in battle to attack the opponent in parallel. Codes could be used to force the system to select a certain assist character.
The Duo Team Attack allows a player to control both characters on his or her team simultaneously for a brief period of time; the characters had unlimited use of their hyper combos during this time. Since some characters have hard-to-avoid super moves that do substantial damage if blocked, the Duo Team Attack can lead to tactics that are oriented around activating it before your opponent could. Since the PlayStation port only allows one character to play on point, a Duo Team Attack would call the assist character repeatedly without cost for its duration.
How to Play
Similar to Street Fighter controls players use an 8-way joystick and a series of 6 buttons consisting of; Jab, strong, fierce, short, forward, roundhouse. Combining these controls in. certain orders will initiate special moves to help defeat your opponent when timed correctly.