as a pit player i feel like ganondorf is at a clear disadvantage. He isnt fast enough to do much about camping, and to make it even worse i feel like pit has the close range advantage as well. Pit an rack up damage so fast against (especially) heavy, large, slower characters like ganon. Well maybe if ganon had a counter this match would be better but he does not.
He loses close range, long range, and off stage as well. Ganon can be gimped and edgeguarded by pit quite easily, whereas ganon cannot do the same to Pit. The only place he may have a chance is in the aerial battles, and a good pit could still cancel that advantage with quick movements and exploiting hit box openings. Ganon is heavy though, and if he stays on the board then he will have a better shot.
Ganon should want to use his U-air in the air, pit cant cover up his feet very well. Also, a few well-placed D-airs should have Pit rethinking his approach. For killing, Pit is low-mid weight, he shouldnt be hard to get the kill on. Ive been killed by nearly every single move ganon has, so like i said, it shouldnt be a problem. You should see pit flying away at 100% from a ganon's Down-B.
STAY AWAY FROM CLOSE RANGE!! Honestly, i dont know if this is how all Pits play, but if a ganon wants to get real cuddly with me, he will just get cut up. Pit's tap-A and angel ring should def. be avoided altogether by ganon. If pit comes near you, kick him with the F-tilt or better yet use the tap A jab to create a small space to SHfair him. Ganon is just the right size and weight that a combo from pit may never end, so dont even give him that first little opening or it might get ugly. So stay away from close range when possible, long range is bad for obvious reasons and i dont think i need to get into that. Concentrate on keeping pit mid-range... this way you can power sheild arrows and be close enough to punish sloppy behavior without getting caught in an endless Pit combo.
Id say that Ganon doesnt want to get aggressive until Pit is at high percentage, heres my reason. Ganon hits hard, and pit is light. When ganon hits pit at a low %, pit will be placed at mid range, Ganon's sweet zone. Here, you need to play it cool and dont jump into close range, because this is bad for Ganon. Keep Pit mid range and lay on the % with a calm cool head. When Pit is high percentage (i mean like >75% for this match up), ganon's attacks will send pit far, but not kill him. This is where you should be aggressive!! If you knock Pit into long range, of course its just gonna be arrows and more arrows once he gets you lined up. Dont let him, follow up your attacks immediately before he can put a target on your head. From here on, chase and chase, land a few good hits and Pit should be dunzo.
Still, it doesnt look too good for Ganon. Im gonna say 65-35 in Pit's favor