The Fusoku Fusoku no Mi is a Paramecia-type Devil fruit which allows the user to to manipulate the windspeed around him and summon storms of different sizes and powers.
Strength and Weakness
The user is able to manipulate the windpower, across a radius of 1 km. He also able to manipulate the windpower in a specific area, like around the enemy's ship or the enemies themselves. At a point if the user has enough energy left the user is able to summon storms from different sizes, The weakest being a weak storm up to a destructive hurricane. The user is only able to manipulate the stormclouds and thus not their production. It's yet to be revealed how the user is able to create clouds (The user probably condense the water in the wind he manipulates. The user is also unharmed by the productions of the clouds the user summoned. Which in this case means the user isn't hurt by hail, lightning, or the wind. The user is also able to end the storms at will or drive away storm that weren't summoned by him.
The user can still harmed by lightning, hail and wind which aren't produced by his/her summoned clouds, which means the user of the Goro Goro no Mi still proves deadly to him/her. Summoning the clouds takes sometime. And the user is also effected by the standard devil fruit