vs
MU
I think it's quite even, to be honest. Both have absurdly fast attacks and both can rack up heavy damage into a KO if they wanted to. While Sheik has her needles, Ganondorf has his WizKick and aerial WizKick, the latter of which can prove deadly against a Sheik using an impromptu U-Air, since the Mix-Up will hit Sheik. Both have some very great grab games that give off a lot of reward, and both have something that balance one another out. Sheik has a great recovery, but let's remember that you should never recover above Ganondorf or whiff a Bouncing Fish in front of him; U-Smash and U-Tilt will get you, respectively.
So honestly, I think it's a 50:50 MU for both; they both just seem to do something to balance the other out. What do you guys think about their MU?