help with choosing a water type

[Shiraishi]

Oh. He asked for a wall O_o There are only 2 walls with decent speed, and none of em are water D; Bah, just use Gyara.

 

[El Gofre]

Gyara can in no way wall, yes its a great bulky water but cant act as a fully fledged wall. As Ive said, SwiftSwim omastar is likely to be your best bet