Successfully complete the indicated task to unlock the corresponding feat and an associated clothing item for Master Higgins:

Action Star: Successfully complete ten different stages without taking any damage.
Adventure Island Hero: Defeat the final boss.
Adventure Island Pro: Successfully complete the special stage.
Fancy Flyer: Fly for ten seconds.
Gladiator: Kill every type of non-boss enemy in the game.
Island Harvest: Score over 1,500 on Fruit Grabber.
Master Chef: Kill 50 DenDen (minor enemies).
Melon Maniac: Collect all 100 Gold Melons.
Mr. 16-Shot: Score 16.0 or higher in Rapid Fire Ruins.
Perfect Shooter: Score over 30,000 on Axe Attack.
Rock Breaker: Destroy 50 rolling boulders.
Speed Boarder: Finish Skateboard Survival in under 40 seconds.
Treasure Hunter: Find all hidden eggs in all stages.
Watermelon Thief?!: Pick up a watermelon in ten different stages. A watermelon appears if you pick up all other food in a stage.
Weapon Collector: Fully upgrade all three main weapons and buy the two additional ones.
Weaponless Master: Successfully complete a level without having or picking up a weapon.