>>40892952The only water move you're going to survive is a Toxapex's scald.
>+2 252+ Atk Coalguy Earthquake vs. 252 HP / 4 Def Toxapex: 248-294 (81.5 - 96.7%) -- guaranteed 2HKO after Black Sludge recoveryYou can't even Ohko a Toxapex with the weakness policy boost in return. Not even with a +Atk nature, which would fuck you over while trying to outspeed things in the first place. This means you can't switch into Toxapex. Toxapex has to be sitting in front of you and choose to use scald so you can damage them on the turn they give you the speed boost, then actually kill them the next turn.
I've seen Showderp strategies more viable than this.