Some Numbers.

[Tangerine]

Standard Ladder

Garchomp is in a good 54.4% of every battle.
Compared to Gengar, who is #2, who is 45.38%.
Gyarados is 35.91%, with Lucario and Metagross hanging around there.

Interesting thing about Gyarados - 35% of them are Life Orb now - meaning that people are catching onto the offensive Gyarados.

Meanwhile in Suspect, Gengar is dominating at 48.39%, and Heatran at 45.86%. Salamence at 41.8%, Lucario at 38.6%, and declining from that.

Basically instead of Garchomp people are just using other top tier OUs, as expected (the 10th place in each respective metagame has roughly the same % of usage). However, most of these threats can be kept in check - which is why none of them are so highly dominating over the other, like in the case of Garchomp/Gengar in Standard.

 

[X-Act]

This is just for everyone's information.

Suppose "Pokemon X" was used 10 times in 20 battles. Can we say that "Pokemon X" was used in 50% of battles? No. It would have been used in between 5 and 10 battles. Why? Because two "Pokemon X" could have been used in one battle.

So the way to calculate it is as follows. Since there were 20 battles, then there were 40 teams that were used in those battles in all, 10 of which had "Pokemon X". Thus the probability that "Pokemon X" is in a team is equal to P = 10/40, or 0.25.

Now what is the probability that a battle, containing two teams, does NOT have "Pokemon X" in either team? The probability that "Pokemon X" is not in a team is 1-P. So the probability that "Pokemon X" is not in both teams is equal to (1-P) x (1-P), or (1-P)^2.

Thus, the probability that a battle contains "Pokemon X" in either or both teams is equal to 1 - (1-P)^2.

In our case, the answer would be 1 - (1-0.25)^2 = 1 - (0.75)^2 = 1 - 0.5625 = 0.4375, or 43.75%.

That is how I calculated the probabilities in my statistics.

 

[Stallion]

Thanks X-Act, I could actually follow what you were writing as well which I'm proud of :D. I'm off to make a probability calculator on Excel and I'll post it soonish.

@ X-Act, if Tangerine's numbers are wrong, would you mind posting some of your numbers that you got.

 

[X-Act]

They're all listed in Doug's statistics thread on page 2.

 

[X-Act]

Here's a graph of how the Standard metagame usages compare with the Suspect metagame usages of the top 60 Pokemon used in both:

As you can see, the blue graph (Standard) is almost always below the green graph (Suspect) until Pokemon #27, except for Pokemon #1. Note especially the usages between Pokemon #2 and #7 and between Pokemon #12 and #27. This is the reason why the Suspect ladder reaches 75% earlier than Standard.