Collect ALL the cousins and take them to the snowy island. Then release them and press 'A' to create a snowball. Throw the snowball with 'A' at a cousin and then avoid any retaliation. If the snowball hits another cousin they will then also try to hit you and If you keep avoiding the snowballs they will keep throwing them until you or nobody is hit.

This Outfit which looks similar to the king's clothes on most cousins is obtained when you have collected 100% of the items.

When you have collected 100 points on a level Endless mode will become unlocked as an option. In this mode there is no objective or time limit.