Re; Championship Points
From Pokemon.com:
How Does This Affect Me?
For a more in-depth look at how Win Expectancy is actually calculated, please see the Ratings and Rankings FAQ on our Rules and Resources page.
Premier Ratings and Worlds
All invitations for the World Championships are now awarded via National Championship, or Championship Points.
Invitational Tiebreakers
If necessary, Pokémon Organized Play will use players' Elo rating to break ties for invitations awarded via the Championship Point system.