Chopper has always had one of the more interesting Devil Fruits in One Piece. The Human-Human Fruit, despite being incredibly simple, is a fairly important part of One Piece lore, with its models, like the Human-Human Fruit Model: Buddha and the Human-Human Fruit Model: Sun God Nika, being incredibly relevant to the modern story. Plus, the fruit itself, being a Human-Human Zoan Fruit, presents some interesting connotations.