A Water Pokemon's weaknesses are Electric and Grass.
Basically any type of Pokemon can beat a water Pokemon if it's strong enough, but Electric and Grass attacks do 2X damage against Water types.
Water types also only take half damage from Fire, Ice, Steel, and Water attacks, so those wouldn't be the best ones to use.
Water attacks do half damage to Dragon, Grass, and Water Pokemon. Its strengths are against Fire, Ground, and Rock.
Piplup (Starter)
Magikarp
Gyarados
Psyduck
Golduck
Buizel
Floatzel
Shellos (East/West)
Gastrodon (East/West)
Goldeen
Barboach
Wingull
Pelipper
Marill
Remoraid
Tentacool
Tentacruel
Feebas
Mantyke
Manaphy
Phione
Water types are weak against grass and electric types. Fire, rock, and ground types are weak against water types. Some water types also have another type like ground or poison. Therefore, they will have other strengths and weaknesses. It depends on the pokemon.
fire type and rock type would be super effective, but it can beat anything if it has good moves and a good player
Water type moves are strong against Ground, Rock, and Fire type Pokemon.
any electric or grass Pokemon or ground
A grass Pokemon can beat a water Pokemon
I would choose a Dark or Ghost type
Rock type Pokemon are strong against flying, ice, bug and fire type Pokemon.
They're are many ways to get or catch a water Pokemon in Pokemon Diamond. You could get a fishing rod from a fisher man, obtain the HM Surf and use above water to encounter a wild water type Pokemon, trade someone or migrate a water type Pokemon from your old GBA games. Peace.
water or grass type Pokemon
the trick is to use the highest lv of water or ground Pokemon you have
I would choose a Dark or Ghost type
Get lots of fire type Pokemon! hope it helps!
Remoraid is a pokemon(water type)
Really, any Pokemon can beat a water Pokemon if its strong enough but the easiest way is to use a grass or electric type that has a same or greater level than the water type.
with water type and rock type pokemon.
to beat the third gym leader use an ground and flying and water and dark type it worked for me trust it!!!!! I pitty da fool!
the best way to beat the 7th gym leader is with a fire type Pokemon
Rock type Pokemon are strong against flying, ice, bug and fire type Pokemon.
You go to Canalave City left of Jublife City. The gym leader there uses steel types. So be ready with fighting or water type Pokemon
use ground type
to beat reshiram you need to use a water type or leaf type pokemon
A fighting type, a ghost type, a rock type, a ice type, a water type.