*reads a bit*
Ah, the other swords don't fit, eh? Shame.
Well, I promised that I'd comment and suggest, so I will then.
As I mentioned before, it would be great if his Win3 animation was on the right-taunt. Or, if you're having trouble with that, change the taunts when he enters Sword mode. (Assuming you can) I tested him out, by the way. The flame choke doesn't extend to all of the distance it covers. I don't know if that was deliberate or not, but you could shorten the distance and start the choke a tad later. Also, I find his jumps to be a tad....well....
.....He jumps too high. Not that I'm complaining, but it needs to be lessened by just a smidge. It makes his Down aerial A hard to land. Or better yet, you could increase the hitbox of it. That would be good, too.
As for a final smash, (if that's even possible) the Dark Hole magic attack from Ocarina of time is a possibility. But have it only usable while in sword mode. While without it, the regular Ganon summoning would be good. Possibly make him contollable? There's a FitGanonFinal out there that turns him into a red and black dragon. You could incorperate that into it, I guess. Not sure, though.
As for his "chance" attack...I have an idea. If you can make it chainable from his dashing, you can make it so that people would have to guess whether he's going to use his dash attack or his chance attack. Mindgames for all. Also, the chance attack needs a tad less super armor. I'm thinking "get hit once or twice and not flinch" then flinch after the third hit? Either way, you had the right idea with it. It's an attack that you dodge, not one you counter attack. Possibly rack up the damage a tad? I liked it in the twilight moveset when it was an instant kill move. It just needed the extra armor that you gave it in this one. It would have been balenced, methinks.
I have to say that it IS awesome that the Warlock Punch fires energy balls. It makes up for his lack of ranged attacks. But having them always fire at full strength is kinda overpowered. Maybe find a way to put a "charge" option on his neutral ground B so that the longer you hold the button down, the stronger the energy ball becomes? that would balence it out rather than Ganon spamming super scope blasts every 3 seonds.
Speaking of the energy balls, the sword mode version needs a shorter charge time. Either that, or a longer range. I've faced a few people using it and they got within my hit range before I could full charge it. I think it even exceeds Samus's Charge Beam shot time. That isn't good, in my opinion. the rest of the properties of it are good, though.
I promise to add more suggestions if I can think of them. Remember, I don't know jack diddly about Brawl hacking so this is all from the equivelent of the five-year-old child advisor from the Evil Overlord list. I don't know what you can and can't do, so don't be mad bro, k? I only want to help.