I just watched the battle again. After draco meteor I had 10 HP left lol. Gyarados, Breloom, and Dragonite all just about slaughtered Reuniclus with waterfall, seed bomb, and draco meteor. Your Gyarados was the turning point in the battle because of over prediction. If you would've used another waterfall Reuniclus would've been done and I would've had nothing to take him out since you were already set up with DD, you would've swept the rest of my team.