A new feature added to HG&SS is making Aprishakes from Apricorns... Similar to Poffins and Pokeblock in previous games, but instead of enhancing contest stat appeal, it enhances Pokethon stats. (Lower)
Different Colored Apricorns increase different stats. (They also have different flavors, so be careful...)
Blue Apricorn Increases Technique; Dry Flavor
Green Apricorn Increases Jump; Bitter Flavor
Pink Apricorn Increases Speed; Sweet Flavor
Red Apricorn Increases Power; Spicy Flavor
Yellow Apricorn Increases Stamina; Sour Flavor
Black Apricorn Increases All Stats slightly; No Flavor
White Apricorn Increases All Stats slightly; No Flavor
Pokethon is another feature added on in the 4th gen. remake. It's like a mini Olympics for your Pokemon: they can participate in various games with NPCs or your friends via WiFi. They can in the following events;
Dash Hurdles
Stats Used: Speed, Jump
Bounce Field
Stats Used: Technique, Jump
Ring Match
Stats Used: Power, Stamina
Snowball Fight
Stats Used: Power, Technique
Relay Race
Stats Used: Speed, Stamina
Brick Break
Stats Used: Power, Stamina
Push Circle
Stats Used: Power, Speed
Capture the Flag
Stats Used: Technique, Speed
Frizbee Toss
Stats Used: Jump, Power
Soccer
Stats Used: Technique, Power
Rewards are handed out daily for the top 3 places... and they vary day by day. They usually consist of another Apricorn, A stat enhancing item (HP Up, Carbos, ext.) and/or Evolution-related items.