When on an area that has a bomb, jump immediately before it then land on it. This requires some practice. When timed correctly, you will be able to get a quick special move (such as A + Y + A) in for an extra 6,000 or so points. This is useful for beginners that do not have all of their equipment yet.
get to a grind rail and press Y and hold it to start a grind, now either hold right or left to start spinning, this racks up points, straighten out now and tap A to jup re grind the bar again and spin again, now jump of and spin if close to the ground, if up high land some flips, you get sereous points to unlock items.
To unlock all secret characters, beat the game with Naya.
Dynamic 3000-Score 1,000,000 points
Outfit 2-Score 50,000 points
Outfit 10-Score 750,000 points
Outfit 11-Score 875,000 points
Outfit 12-Score 1,000,000 points
Outfit 13-Score 1,250,000 points
Outfit 14-Score 1,500,000 points
Outfit 15-Score 1,750,000 points
Outfit 16-Score 2,000,000 points
Outfit 3-Score 100,000 points
Outfit 4-Score 150,000 points
Outfit 5-Score 200,000 points
Outfit 6-Score 250,000 points
Outfit 7-Score 375,000 points
Outfit 8-Score 500,000 points
Outfit 9-Score 625,000 points
Prototype MG-Score 2,000,000 points
Slick 250-Score 250,000 points
Unlock Helidrop-Complete the challenge named "Ski Patrol Chief"
Unlock Moon Gate-Complete the challenge named "Do Not Enter"