Yes any water pokemon can beat any other water pokemon. it's all about level and power of the attack.
Water, ground, and rock.
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.
Have ALOT of Water and Ghost Pokemon
with water type and rock type pokemon.
Get a strong water pokemon. I used Azumarill.
Easy just get as many plant or water type pokemon and you will beat it
Water pokemon
No
you use strong Pokemon posibly water and lv100.
Have a water ice or grass pokemon.
water or grass type Pokemon
water is super-effective to ground, rock, and fire.