Which HM/Former HM is used most in comp?

Question

I am guessing... Waterfall???

Comments

probably defog

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Surf (filler)

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I'd guess waterfall but don't quote me on that

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Defog is used more often in singles, Surf is used more often in doubles. It could vary by format. :P

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What format?

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@sumwun ou double and singles

Answer 1

OU: defog
DOU: surf
source
note that I used the stats from the highest GLICKO rating and ignored everything used less than 3.4%