Okay, so this is pretty arbitrary, but how come Morro was able to do Airjitzu perfectly after just reading the scroll a few seconds, but the ninja had to practice and struggle for ages?-ShinyShiny9
Sensei WU said that Morro was one of his most gifted students. I would be willing to bet he was even genius level. This may have been one of the reasons why.
Another reason why may be because he's a ghost. I'll explain. It was hard for the ninja to do airjitsu because they couldn't get enough power to lift their body weight, since Morro is a ghost and doesn't really have body weight, it would have been easier for him to generate lift.