Just reached the Pokémon league on my first playthrough of it. Only using sinnoh Pokémon which has been an interesting restriction. My planned elite 4 team is
Torterra
Froslass
Gastrodon
Lopunny
Bronzong
Luxray
I've had fun, the HM stuff is pretty annoying as I've not put HMs on any of my elite 4 mons. Needing two slaves to grind in victory road is dumb.