Hey really i think i would win joken
Apocalypse will win fighting Onslaught why? u ask cause hes a Mutant warlord and not only that he Apocalypse possesses extraordinary strength. Also, he can alter his body's atomic structure at will, levitate himself telekinetically, survive for weeks without food and water, and recover rapidly from injuries that would prove fatal to most mutants and humans. His physical form eventually grows too aged and enfeebled to contain his vast energies, requiring him to transfer his consciousness into a succession of host bodies.