I got this from the Wikipedia
Apocalypse is one of the most powerful mutants who ever lived. Apocalypse can alter the molecular structure of his body at will in order to change his form. After exposure to Ship (Celestial technology left behind on earth by a race of space gods) this ability, and all of Apocalypse's other powers, have been enhanced far beyond their original limits. He can alter his appearance or the size of his body; he can, for example, transform his arms and fists into various melee weapons and grant himself superhuman strength and grow to enormous sizes. He also can generate energy, thanks to a combination of his mutant power and the Celestial technology in his body. He has also demonstrated telekinesis, telepathy, the ability to create force fields, project bursts of concussive force, and can augment himself further by drawing on various outside energy sources. Apocalypse also demonstrated the ability to teleport himself and other beings (it is unclear if he required amplifying technology to do some of these things).
Apocalypse's original body was immortal. Even before being modified by the Celestial ship, he lived for thousands of years and was highly resistant to injury. With the Celestial modifications, this resistance to harm was amplified, although it is still possible to cause him injury that would not be immediately regenerated by his power. Should he suffer massive injuries that prove potentially fatal, he can enter a coma-like state of suspended animation during which he may recover from his wounds with the assistance of his Celestial technology.
In the future timeline from which Cable hails, Apocalypse's physical form was no longer able to contain his vast superhuman energies resulting in his original body burning out. Hence, he transferred his consciousness and powers into a succession of host bodies, abandoning each one when it too grew too old to contain his power. This alternate future version of Apocalypse was ultimately defeated in transit from a depreciated body into a potential host body.
Shortly before he transferred himself into Cyclops, he revealed that he was in a host body in the present day. It is not entirely clear when this happened, but the most likely time is when he appeared to die on the Moon.
Aside from his superhuman powers, Apocalypse is also extraordinarily intelligent, a genius with knowledge of science and technology centuries ahead of conventional science. This was not merely a result of his exposure to alien technology, as he was able to make significant new advances beyond the alien materials to which he was exposed.
heres the link
http://en.wikipedia.org/wiki/Apocalypse_(comics)