Who are you calling a n00b? Shadowlink? I'm mostly in agreement with both his statements:
Falcon punch has poor priority. it breaks to nearly everything.
Most aerials cannot be clashed, whereas Falcon Punch is a Special that
can clash, so it's just a matter of spacing the aerial right and you win. Falcon's punch actually leaves Falcon's hurtbox exposed around the fist, so if you're able to get a hitbox in there during the punch part, you'll hit him and possibly without taking damage. You can even do this with Sonic's Fair, but it's much harder than Bair.
Pretty much any hitbox (I'm including ground attacks and specials now) that causes
within 10% of a Falcon punch will make it clash, so it won't hurt you (it's a single-hit attack). How much damage does a falcon punch typically cause? I'm not sure, but I think this puts
plenty of attacks in the equal-or-better-priority-than-falcon-punch category.
Anyways the Fsmash is good for breaking MK tornado users specially the aerial one.
You have to space it well, but this is also correct. If MK tornado is on the ground, it's harder to "break" the tornado; because hitting its hitbox with most attacks will cause the tornado to quickly stop, without MK getting hurt. And from most directions, his hurtbox is buried in the hitbox, so this is the typical case. So it depends how you space a Sonic fsmash if you want to
hurt MK out of the tornado.
An aerial tornado is easier to hit, because Sonic's fsmash is a disjointed hitbox that can reach into the 'nado to damage MK without Sonic getting hurt. You've got to think about where Sonic and MK would be for Sonic to be able to use a ground attack against an aerial tornado, but if this is about to happen then it's usually not bad for Sonic. Remember that you can angle the Fsmash to reach into MK's hurtbox. I just did this a bunch in training mode.
But it's kinda moot because usually the 'nado's coming towards you so it's hard in practice for Sonic to stop the 'nado with his fsmash. But if ShadowLink has success with this against real people, it wouldn't surprise me too much. *shrug*