Black Apricon: Heavy ball (used for catching very heavy pokemon)
Red Apricorn: Level ball (good for catching pokemon with a mch lower level than your's)
Yellow Apricorn: Moon ball (good for catching pokemon that evolve with a moon stone)
Pink Apricorn: Love ball (good for catching pokemon of the opisite gender)
Green Apricorn: Friend ball (pokemon caught in it will like you faster)
Blue Apricorn: Lure Ball (good for catching pokemon that you encounter when fishing)
White Apricorn: Fast Ball (good for catching pokemon that tend to flee battle)