Seven Deadly Sins
~hallelujah~
No, Flygon can't sweep shit. It doesn't hit hard enough, it isn't fast enough, and it isn't durable enough to bulkysweep.
EDIT: I don't want to seem like a jerk, so here's some actual useful reasons that Flygon won't be used even with Outrage. No boosting move means that a ton of stuff walls it silly and kills it with Ice Beam. Not that Ice Beam is necessary, it doesn't have the bulk to survive too many neutral moves either. Its resistances aren't bad, resisting Fire, Rock, and Poison, and being immune to Ground and Electric, but it's neutral to stuff like Surf and Grass Knot, and is also outsped by plenty of stuff.
Furthermore, let's look at the OTHER thing to get STAB Outrage, Kingdra. It has access to Dragon Dance, as well as only having one weakness, Dragon. It can run a mixed set because of its great movepool and decent Special Attack, and it can also benefit from Rain if need be. It's bulkier too, with 75/95/95 defenses, which are by no means bad, and certainly better than Flygon's 80/80/80.
If you're looking for a Dragon in OU that isn't Salamence/Dragonite, Kingdra fits the bill way better than Flygon ever will.
EDIT: I don't want to seem like a jerk, so here's some actual useful reasons that Flygon won't be used even with Outrage. No boosting move means that a ton of stuff walls it silly and kills it with Ice Beam. Not that Ice Beam is necessary, it doesn't have the bulk to survive too many neutral moves either. Its resistances aren't bad, resisting Fire, Rock, and Poison, and being immune to Ground and Electric, but it's neutral to stuff like Surf and Grass Knot, and is also outsped by plenty of stuff.
Furthermore, let's look at the OTHER thing to get STAB Outrage, Kingdra. It has access to Dragon Dance, as well as only having one weakness, Dragon. It can run a mixed set because of its great movepool and decent Special Attack, and it can also benefit from Rain if need be. It's bulkier too, with 75/95/95 defenses, which are by no means bad, and certainly better than Flygon's 80/80/80.
If you're looking for a Dragon in OU that isn't Salamence/Dragonite, Kingdra fits the bill way better than Flygon ever will.