Quick answer
What is Foxy's Devil Fruit?
Verified through chapter 309Updated
What the manga shows
3 factsFoxy fires the Noro-Noro beam from his hand to slow targets.
The beam slows physical velocity for around thirty seconds.
Foxy possesses the Noro-Noro Fruit power.
Change log
1 chapter- Chapter 309Added 3 facts; updated the answer