Samus owns everybody below her badly, but once it gets to the high tier characters, who as a result are the more popular ones, samus faces trouble. Though it may not make a difference in the tier list (yet), I also believe Samus has amazing potential. With great Projectiles, strong aerials, a great CC and ground game, a great wavedash, the super wavedash (sure it's tough, but many pro Samus players are getting better with it, and speaking of potential, I think soon more people will learn it), and an amazing recovery that in many cases are almost limitless (trusted the player is good with bomb-DI), Samus should at least stay where she is, IMO. another problem she has is even though there are plenty of decent mainers, none are outstanding. this seams to also be the case for Dr. Mario (to a stronger extent, IMO). Ganon on the other hand has proved outstanding when used by linguini.