Place it at the very start of a versus edit, just before the first match footage, after an Enemy Spotted cue introduces the opponent. Follow it with Okay Let's Go once the fighters are shown, then move straight to gameplay without another intro sound.
About this sound
This is the two-second announcer voice from The King of Fighters 2003, calling out ready and go to start a match. The sharp, energetic delivery builds instant tension and excitement, like the seconds before a fight begins. It comes straight from the arcade fighting game, where the call signals both players to begin.