If politad use surf will its teamate who has storm drain suck all up?

Question

Ik storm drain sucks in all water moves and boost sp atk. But if in double battle politoad uses surf, will its ally with storm drain suck it all up and my oponents not be damage?

Answer 1

Both your opponent Pokemon are damaged. In fact, it's one of the better Rain tactics. Sometimes, both Pokemon has Storm Drain and keep using Surf, hitting opponents for harder damage each turn, as both gain the Special Attack boost.

Source: Experience.