You have become the sole embodiment of the Ultimate Lifeform, the apex being of Earths food chain. You are distinctly unique, even from any alternate versions of yourself.
You possess immense physical strength, capable of flipping islands, and unmatched durability to withstand similar devastating blows. Your speed surpasses even the swiftest Stands, rendering you invisible to the naked eye. Even if reduced to a single cell, your regenerative abilities restore you to full health within seconds. Complete control, awareness, and knowledge over your biology grant you the ability to modify your features and transform individual cells into sentient creatures like birds or other animals. Moreover, by mere touch, you can extend this control to reshape other beings as you see fit, instantly comprehending their biological makeup. Unlike others, you can harbor multiple Stands within yourself, surpassing the single Stand restriction.
Your mental prowess is equally unmatched. Your memory and intelligence eclipses that of any human, enabling you to acquire years' worth of knowledge and information within moments. Your senses surpass even the most acute abilities of the animal kingdom, enhanced by an array of sensory organs beyond human capacity.
However, your most formidable and deserving attribute of the "Ultimate Lifeform" title is your Understanding. Through mere observation of an ability, you can replicate and perfect it, assimilating the powers of others at a superior level. You can create superior abilities based on those you have copied, endowing them with amplified abilities surpassing the original versions. There is, however, one restriction to this ability: you can only replicate powers within your own capability. If an ability relies on an energy source you lack or cannot acquire through bodily transformation, you cannot replicate it.
You are no longer weak to sunlight, in fact if you have Hamon Breathing you can become the most powerful Hamon User in history.