Talk:Saitama/@comment-27131953-20160929043832/@comment-25893909-20161028194615

Crossovers happen because of a reason, to see the guy who is more powerful. Goku, even if he trains harder, would be unable to beat Saitama, because forget strength, this becomes a question of durability. Both Superman and Saitama harbor Invulnerability, Goku does not.

Crossovers are the reason fictional characters retain their powers in both their universes and other universes, unless powers like reality warping and omnipotence come into place.