Chopper’s old hat was replaced with a new one after the timeskip in the series. The original hat, given to him by Dr. Hiluluk, remains a treasured item.
In the anime and manga series “One Piece,” Tony Tony Chopper is a beloved character known for his signature pink hat with a white cross on it. This hat was a gift from his mentor and father figure, Dr. Hiluluk, which makes it a symbol of their bond and Chopper’s past. However, after the two-year timeskip in the series, Chopper is seen wearing a new, similar hat that also has a cross on it but with added detail and a different design, reflecting his growth and the changes he has undergone during the timeskip.
The original hat is not discarded but rather kept safe as a memento of Chopper’s journey and the lessons he learned from Dr. Hiluluk. The change in his hat is also indicative of Chopper’s development as a character, both in strength and maturity. The new hat can be seen as a representation of his new abilities and confidence, while still honoring the memory of his beloved mentor.