What are skill points in Wii Sports Resort?

Answer 1

Skill points are a rough measure of how good a player is at a certain event, or at least how much he/has played it. After every game, the player is awarded (or penalized) a number of skill points, depending on how well he/she performed. After accumulating 1,000 skill points, the player is promoted to "Pro" class. In some events, the player can face off against an extremely skilled computer-controlled "Champion" after reaching around 1,500 skill points then at 2,000 skill points you become a superstar.

Answer 2

The best way is to play as many rounds as you can against the Wii.