Mah boi is getting his own moveset!
Suggestions:
OoT Ganon:
Up B: Hover (jumps 3/4 as high as Falcon's Up B and hovers in direction of control stick for a short distance)
Neutral B: Lightning Sphere (like Aura Sphere, but does electric damage)
Side B: Waves of Darkness (a damaging cloud of darkness that comes out of one hand)
Down B: Earth Pound (uses animation of f-air, shakes the ground near him and deal damage)
Young Ganon:
Side B: Sword rush (make it like Ike's side B, but when it connects, he can spin once for a combo)
The rest: Maybe just a fast, light version of OoT Ganon?