There are many Water Type Pokemon in Pokemon Platinum, however, there is only one strongest one. That Pokemon is Palkia.
Palkia is one of the Main Storyline Legendaries in Pokemon Pearl, it is a Water/Dragon Type.
If you are looking for the strongest Non-Legendary, your best bet is Gyarados.
Any exceptions?
I think fire and flying are good against nature type pokemon!!
it is either overheat or blastburn
Torterra is the strongest Grass Pokemon in Diamona and Pearl.
If you include hms, and mean all around strongest, use surf.
Gyarados is a Water and Flying type Pokemon.
arceusKyogre is the strongest water type Pokémon.
the strongest water Pokemon is Palkia
The strongest is always Arceus using the Flame and Splash Plates, respectively. Not counting him, the strongest Fire-type is Kyurem (while in White Forme) and the strongest Water-type is Palkia. If you are not counting alternate formes at all, then Reshiram and Ho-Oh share the same place as strongest Fire-Type.
I think fire and flying are good against nature type pokemon!!
The strongest electric type would be Zapdos.
go to a Pokemon center & go to deposit then press the [A] button on release. from the STRONGEST WATER TYPE LOVER POKEMON MASTER!
blastoise is the best
Darkrai?
Rayquaza.
Depends on which version your playing, gyarados, lapras and kingdra are the best in my oppinion
Technically Cyndiquil is the strongest but it all depends on what type of Pokemon you want.
no strongest. just depends on who has the type advantage in a battle. they're all great pokemon!