Win the Topaz Grand Prix on the Rookie difficulty setting to unlock Lanky Kong.
Defeat Cranky Kong in Candy's Requests, Level 3, Mission 24 to unlock him.
Win the Diamond Grand Prix on the Rookie difficulty setting to unlock Funky Kong.
Defeat King K. Rool in Candy's Requests, Level 4, Mission 31 to unlock him.
Win the Sapphire Grand Prix on the Rookie difficulty setting to unlock Tiny Kong.