What it does
If Rain Dance is active, this Pokemon's Speed is doubled. This effect is prevented if this Pokemon is holding a Utility Umbrella.
Smogon rates it
3 on their competitive scale, where 5 is format-defining and 0 is
actively unhelpful.
Who runs it
6 of the 282 Pokémon measured on the
Regulation M-B ladder run Swift Swim.
The one that matters most is Basculegion,
which is on 30.2% of teams and runs it on 6.7% of its sets.
The full list is above, ordered by how much of the format each one is.
Who has it at all
5 of the Pokémon legal in Regulation M-B have Swift Swim in
their ability list, and 6 of those are played often enough to measure. An
ability is not a choice the way a move or an item is — most Pokémon that have it have no
alternative worth taking — so the gap here is about what sees play, not about what is preferred.
How concentrated it is
Across the ladder, Swift Swim accounts for an expected
0.11 of the six slots on an average team, which makes it the
7th most-brought of the 19 abilities this format runs.
19% of that comes from Basculegion alone, so it is spread across the field rather than propped up by one Pokémon.
Its users are mostly Water (4), Ghost (2) and Poison (2).
Where these numbers come from
Usage is Smogon's published statistics for the Regulation M-B VGC ladder, and the description is
the one shipped in the Pokémon Showdown data set. Both are regenerated on every build rather than
written by hand, so this page follows the format instead of trailing it. Take any of it to the
team builder or the damage calculator.
Basculegion
30.2%
6.7%
Mega Swampert
8.5%
100%
Overqwil
0.62%
18.3%
Basculegion-F
0.36%
56.5%
Beartic
0.03%
56.8%
Qwilfish
0.01%
8.1%