Unlock the following characters for purchase by performing the corresponding tasks:

CHARACTER - HOW TO UNLOCK
Black Frost - Defeat Black Frost when he randomly appears in World Tour mode grade A to unlock him for purchase at the shop for 200,000 points.
Jack Frost - Defeat Jack Frost when he randomly appears in World Tour mode grade B to unlock him for purchase at the shop for 75,000 points.
Max - Defeat Max when he randomly appears in World Tour mode grade C to unlock him for purchase at the shop for 50,000 points.