>>24675799It depends on the rest of your team and the tier/format/rules/game you play in.
Arceus-water
(M)-Blastoise
Clamperl@tooth
Clawitzer
Dewgong
Golduck
Gprebyss
Keldeo
Kingdra
(P)-Kyogre
Lanturn
Lapras
Lumineon
luvdisk
Manaphy
Mantine
Octilery
Omastar
Palkia
Peliper
Poliwrath
Seismitoad
Simipour
(M)-slowbro
Slowking
Starmie
Swanna
Tentacruel
Vaporeon
Wailord
Walrein
There, those are pretty much all of them, pick one that suits your needs.