Well as far as advice goes...
From what i saw it appears to me that you are playing ganon as if he didnt suck. Using Forward smashes when your opponent were in close range and trying to assault with F air. F-air is a kill move, dont rush with it, kill with it, use it in the air off the stage, best place for it.
For some god-awful reason ganon's F smash is slow and has no range and doesnt even hit that hard (D3, Ike and snake's all have more range and hit twice as hard, wth?). But it does come out fairly quick, use it basically as a faster warlock punch, something you know they cant escape.
Use the dash attack more, it comes out **** fast and hits **** hard. I highly reccomend using dash and c stick down at the same time cause that will get it out the fastest. Most people who use ganon dont use this enough, its really good, harder to punish than the f smash or tilt. Best yet you can follow up with it too.
When stomping make sure u do it on the way up on the hops so u dont lag, if they block/dodge them, get them with a f-tilt or d-tilt doing it again will make u predictable and get you punished.
Also when above your foe, drop on em with down-B instead of a stomp, the timing for the stomp makes you vulnerable on the way down. The down -b has just about the same kill power but it comes down faster, making it harder to avoid as well as has splash at the floor so its harder to dodge.
Oh, side B, I cant stress this, but dont do this move unless you know what you are going to do after. This move isnt about the damage (9 is pitiful) its a setup, if all you can think of is a jab after you might wanna use something else.
Thats all the advice i can think of, keep at it, hes hard to use.