If they aren't in the metagame right now, they aren't effecting it.
*Note: The title says which pokemon has had the most effect on the OU metagame.
I would have to say Salamence. He essentially shaped it into what it is, even though he isn't there.
If they aren't in the metagame right now, they aren't effecting it.
A poll is bad if the Others section have the most votes.
Ninjask + Electivire
Hands down
Pokemon who are currently banned from OU shouldn't be listed. They aren't apart of the metagame.
Blissey hands down.
My vote is other. Specifically Latias. Over the years, the metagame has changed significantly. At one point, Garchomp had the most effect, down the road it was others like Scizor and that dragon, Salamence. Now, Heatran is having the most effect. I think Latias has had the greatest overall effect because of it's blazing speed, numerous resistances, could check much of the metagame.