To be honest the league usually shafts at least one member of the team. For Kalos, Goodra and Noivern got no wins. Unova, if you weren’t Pikachu, Pignite or Krookodile, you got shafted. Sinnoh, Torterra got no wins. Torkoal got the least amount of wins in Hoenn. Totodile, Heracross and Bayleef all got wins. I think Phanphy got a win as well. I think Pikachu, Charizard, Kingler, Squirtle, Bulbasaur and Muk got a win. Did Pidgeotto even battle ? Just humor me for a moment. If Gladion, Hau, Illima and Masked Royal are all in the league. And say Ash is the one that gets Eevee. Each of Ash’s Pokémon can have their own personal rival and get a personal win in the league. I could see Ash’s potential Eevee evolving in a battle with Illima’s Eevee.