Horsea

Horsea can be a threat under rain, but that is where the problem lies. Because manual weather is so bad and it has terrible bulk, Horsea finds itself unable to set up Rain Dance. When it does manage to use Rain Dance, it is forced onto a time limit because of the short duration of manual rain. Furthermore, Horsea is outclassed by other Swift Swim users such as Omanyte, as they can hit much harder than Horsea in the rain. Other offensive Water-types like Corphish outclass it as well because of having better bulk and raw power. Without rain being active, Horsea finds itself slower than a lot of the tier's most common offensive Pokemon.