Is wheatley in portal 2 good or bad

He helps you out in the first half of the game but later becomes mad with power and tries to kill you, so overall I would say bad.

By Jamza94:
But in the ending scene when Wheatley is seen in space he says that he would take it all back if he could and that made me think that maybe there is some kind of a faulty program in the system that makes all the cores connected to it mad. So I don't think that Wheatley is bad but the network he was connected to. Proof to this is that even GLaDOS was somewhat nicer when she was a unplugged from the system.