DIO has two stands the world and and unkown hermit type stand. My theory is that DIO has immense strong hamon since Zepelli gave all his hamon to johnnathan joestar. But DIO is johnnathat joestar so he must have strong hamon power from Zepelli and Johnathan Joestar plus he has vampirism wich makes DIO one of the strongest antanogists of Jojo's Bizarre Adventure.
Thanks for reading this and i hope you support my theory!