Do the following achievements to unlock the corresponding result:
Create-A-Skater: complete Classic mode with any character
Infinite rail, manual, and lip balance: complete Classic mode with two different characters
Tiny Mode: complete Classic mode with three different characters
Giant Mode: complete Classic mode with four different characters
Matrix Mode: complete Classic mode with five different characters
First Person Camera: complete Classic mode with six different characters
Replay Cam: complete Classic mode with seven different characters
Turbo Mode: complete Classic mode with eight different characters
Always Special: complete Classic mode with nine different characters
Paper Tony: complete Classic mode with ten different characters
Hoverboard: complete Classic mode with eleven different characters
Nearly Always Ribbon: complete Classic mode with twelve different characters
Ninja Skater: complete Classic mode with all thirteen characters