The "Special" Course:
There are 3 courses initially. If you beat each course in each category 
(Best Time, Best Tricks, Best Total Points), you will be rewarded with
the "Special" course. 

The "Snowman":
First, you need to get the special course. After you beat the special course 
in all 3 categories, you will have access to the ultimate snowboarder, 
"Snowman". To get him you have to start a game, and choose the best Alpine 
board by hitting Up+Circle+Triangle.

The howling wolves:
On the Expert course, you can sometimes hear wolves howling as you are 
going through the first section of trees. The howls are associated with certain 
trees, or pairs of trees that you have to go between. First Howl:
Go in between the second pair of trees that you encounter after passing the 
house on your left. Second Howl: Go to the right of the next set of trees you 
encounter. Third Howl: Make a hard left. It's in between 2 of the trees, 
but which ones??:) Fourth Howl: Stay to the left. It's in between the fallen tree on 
the left and the standing tree next to it. Fifth Howl: Again, stay left. It's just to the right 
of the furthest left tree as you're 
rounding the corner. Sixth Howl: Just to the left of the final fallen tree on the right 
side of the course. Save to your memory card if you get all six and In the 
loading time between selection screen and play screen,... 
1.Keep pushing L1+L2 With L1 or L2 you can know trick points when you play boards. 
2.Keep pushing player2's R1+R2
You can know the name of the trick.