Successfully complete the indicated round in Versus CPU mode to unlock the corresponding bonus:

Auto Mobile Industry skin and Tire character: Round 2

Go To A Toy Town skin and Robot character: Round 7

Japanese Form skin and Japanese Guy character: Round 6

MOON BEAM skin and Alien character: Round 10

NaHa! skin and Chinese Dragon character: Round 3

Papa's Ukelele skin and Ukelele character: Round 9

That Savanna Calls skin and Lion character: Round 1

The Bird Singing In The Night skin and Bubble Gum Kid character: Round 4

The Speed Of Light skin and Guitar God character: Round 5

Whoop-De-Do skin and Indian character: Round 8