"Real Bout changes the play controls from the previous Fatal Fury games, reducing the number of attack buttons from four to three: a standard Punch and Kick button, a "Strong Attack" button which can be either, a stronger punch or kick attack, depending on the character. The game retains the three-plane "oversway" system from Fatal Fury 3, which features a main lane for fighting, with foreground and background planes used to avoid attacks or leap towards the opponent. A dedicated button is now used to make an "oversway" (or change plane) towards the background or foreground.
Real Bout introduces a Power Gauge which fills up as player performs normal or special techniques against their opponent or defend themselves, similar to many super move gauges featured in other fighting games. The Power Gauge allows players to perform one of three types of Special Techniques, depending of the level of the Power Gauge.
This is a subseries of the main Fatal Fury system. It compromises 2 games (one of them with two versions) and served as based for the Garou: Mark of the Wolves game."
Source: Wikipedia, "Real_Bout_Fatal_Fury", available under the CC-BY-SA License.