Something confuses me in dragon ball:When roshi has a flash back, he says crane didn't turn evil until after mutaito fails to kill piccolo, but in the filer where goku goes back in time, crane is an asshole before picolo and roshi referred to him as a friend before the piccolo incident.Also, why in the piccolo flash back are roshi and crane bald but in the filler do they have hair and glasses?Also, why in the filler does crane have a different outfit in the filler than the other students but in the piccolo flash back he has the same outfit as roshi?
The idea is that Crane Hermit is a selfish man that would do anything to get what he wants. In the past, Master Mutaito was there to ram some discipline in his head and have him under control. Following the events of his death and the defeat of King Piccolo, nothing could really stop him from being a selfish jerk again. Roshi probably didn't mention Crane being bad before King Piccolo's arrival because he wasn't really evil before it either. He was selfish and greedy, but not outright despicable as later... at least not that much. Roshi seeing Crane as a friend might imply that Crane had some redeeming qualities during his years as Roshi's rival under Mutaito's guidance. About their baldness, I think they shaved their heads after a while due to how monks and some martial artists tend to shave their heads. That or it's a plot hole due/filler error. It's again either a plot hole/filler error or they just switched outfits once they reached a certain level of their training, just like how you gain a different color of band as you progress in Judo and Karate.
