To Play As Shinobin
Get a gold cup in Ninja Land. You can then play as Shinobin, a ninja.

Secret Course Code
At the main menu the one that says Start Lession/Option, carefully enter the following: Press Down, Up on the analog, Down Up on the D-Pad, then Down C, Up C, L Button, R Button, Z Button, then Left on the D-Pad, Right C, Up on the analog joystick, B, Right on the D-Pad, Left C and then press Start. A confirmation sound will sound when entered correctly.

Get a boost at the stat of the race/coming off a lift
Hold forwards and tap A, at the start of a race, and when just about to be dropped off by the lift for a little boost.

Unlock Special board 1
Complete the game, then purchase for 80 000g

Special board 2
Obtain a decent score in the trick game (around 2000 points) then purchase for 100 000g

Unlock Special board 3
Obtain Silver Pass, then purchase for 1000g

Quicksand Valley course
Earn gold cups on courses one through six. A new snowboard and the Quicksand Valley desert track will now be available.

Silver Mountain course
Earn a gold cup on the "Quicksand Valley" bonus course. This will also enable a special ending sequence will all characters.

Ninja Land course
Earn a gold cup on the "Silver Mountain" bonus course.

Play as Mrs. Penguin
To play as Mrs. Penguin, do Coach as Halloween or Space.

Play as Shinobin
Earn a gold cup on the "Ninja Land" bonus course.