People usually brought this up for Yujiro in discussions, but they didn't consider what's inside of those tranq darts (& they couldn't him btw, only KO). : r/Grapplerbaki
Historia tranquilizer dart ko by AnimeGirlsKO on DeviantArt
Tranquilizer dart | Scoobypedia | Fandom
THE SYNDICATE TRANQUILIZER HARDTRANCE - Vidéo Dailymotion