There are a total of 10 Freestyle events. You will unlock the following achievements as well:
Every time you level up you will unlock 1 or 2 skill points. Use these to purchase more and better tricks to help you earn more points. Repeating the same trick will shave off 50 points. Make sure to do a trick off every ramp. Try not to use your boost. This will cause you to over shoot a ramp. Also level 1 tricks will do nothing in the later freestyle events so avoid those.
Level 1 tricks = 100 points
Level 2 tricks = 200 points
Level 5 tricks = 250 points
Level 10 tricks = 400 points
Regional Champs = 2
-Time to Shine (1200 points)
-Sun and Surf (1200 points)
Pro Am = 1
-To Infinity (1250 points)
Waverunner Cup = 1
-Shoot the Loop (1500 points)
World Cup = 2
-Big Finish (1400 points)
-Air and Water (1400 points)
Galaxy Cup = 2
-Countdown (1900 points)
-Touch the Sky (1400 points)
Ultimate Cup = 2
-Grandstander (1800 points)
-Freestyle Finale (2000 Points)