User blog comment:Yoshicun/Anyone else thinks Kaido is not a devil fruit user?/@comment-4374114-20160819181730

Maybe Kadio's fruit is a pain fruit. Similar to what was shown with Kuma, Kaido can take any pain inflicted upon himself and redirect it to another user. The more abuse he takes the more he can apply to his enemies.

Though based upon the known fruits of the Yonko we have BM as strong paramecia, BB as "strongest" logia and Shanks with no fruit. This simply leaves on to have some over powered Zoan fruit.