Can't win at all

I watched the video using Sylveon and Gyarados for now. To put it simply, predict your opponent's lead Pokémon. First, predict the opponent's team concept. From there, predict the lead. If you can create an advantageous matchup from the start, your win rate will also significantly increase. ・Mega Gyarados If you can't set up Dragon Dance, its firepower is decent, and its defenses can only suppress physical attacks to a guaranteed 2-hit KO, while special defense is average. So, don't just throw it out carelessly thinking it's a physical attacker, as it might not have an opening for Dragon Dance. It's a Pokémon that fundamentally relies on safe switches. ・Sylveon It's basically used to switch in against Dragons or special attackers. Its firepower is low and it doesn't have many coverage moves, so it's best to use Yawn and switch out unless it's a favorable matchup. You need to be careful with physical attackers as its physical bulk isn't high. One concern is that all 6 Pokémon are very popular. Since their strategies are well-known, their moves are more predictable the higher you go in the ranks.