double click fleg remix and add your own characters, you get the drill. john vs irios from the super adventures of john real!!!!11!1!!!11!!!1!!!!1!!!!!!1!!@1 (note: when i tested this, some stuff kinda glitched out. so if you see the health bar move out of where it's supposed to be, idk how to fix it so don't ask me to.)
i made the ays engine, well sort of. i actually just took @TimmyTheGamingLord's golden apple ays engine and tweaked it a bit. here's the link to the engine for those who don't know: https://scratch.mit.edu/projects/791359153