Chase off Kiki!
From the Super Mario Wiki
Chase Off Kiki! is a minigame in Icepeak in the DS game Mario & Sonic at the Olympic Winter Games. The player plays as Princess Daisy in this game. The player uses the control pad and the B button to play. The player must move up and down the Freezalias flower patch to hit Kiki several times within forty-five seconds to complete the minigame. Kiki and Chao will pop out of the Freezalias. Daisy must throw a snowball at Kiki, but avoid hitting Chao or Daisy will be upset for a few seconds. Occasionally, Kiki will pop out and throw a snowball. If the snowball hits Daisy, then she will be dizzy for a few seconds.
Hit Kiki with snowballs until his HP reaches 0. If you hit Chao, Daisy will get upset!