Put it at the end of a character selection sequence, right after the final pick is shown, then follow it with Enemy Spotted as the opponent appears and Okay Let's Go when the match starts.
Über diesen Sound
This is the short confirmation sound from JoJo's Bizarre Adventure: Heritage for the Future, lasting under a second and used to mark a menu choice as accepted. It feels decisive and satisfying, like a small victory before a match begins, with a retro-game energy that JoJo fans recognise instantly. The cue comes from the Capcom fighting game based on the manga and anime series.