Okay, thank you for the tip :)
I`ve planned to learn Qwilfish Destiny Bond...
Becuase it has a weak Def and Sp.Def Stat.
Thanks to Slowkings Trick Room I`ll use Destiny Bond first --> opponent uses a physical/special attack, which is powered by his max evs.
If Qwilfish dies, then the opponent pokemon will die too.
If not, then I`ll use Explosion! Ka-bumm!