swift-swim
Effect:
This Pokémon's Speed is doubled during rain. This bonus does not count as a stat modifier.
Pokemon with the ability:
psyduck
golduck
poliwag
poliwhirl
poliwrath
horsea
goldeen
seaking
magikarp
omanyte
omastar
kabuto
kabutops
qwilfish
mantine
kingdra
lotad
lombre
ludicolo
surskit
anorith
armaldo
feebas
huntail
gorebyss
relicanth
luvdisc
buizel
floatzel
finneon
lumineon
mantyke
tympole
palpitoad
seismitoad
tirtouga
carracosta
beartic
chewtle
drednaw
arrokuda
barraskewda
basculegion-male
overqwil
swampert-mega
drednaw-gmax
qwilfish-hisui
basculegion-female