You need to participate in the event to get this.

Participate in the event and complete tasks to get rewards such as Candy Impact decorations, Candy Impact avatars, stamps, pumpkin dolls, and scan currency.

Event time: October 27th - November 6th.

If you own AP-level skin Michelle Pumpkin Witch and Pumpkin Witch decoration, you can get Pumpkin Witch avatar*1, silver coins*200, and activity level*100.