User blog comment:Kaido King of the Beasts/Best and Worst Filler Devil Fruits/@comment-5690257-20150830183714

I once made a list of strongest devil fruits, including every single devil fruit:

Weakest Devil Fruit of all: Samu Samu no Mi (Bad Puns fruit)

Weakest non-canon Devil Fruit that isn't SBS: Alpaca fruit

Weakest canon Devil Fruit: Epoida's. You grow circles around your waist. That's it.