Ye dugtrio is actually a solid choice for weather teams, rain in particular. All it takes is for him to switch into tyranitar or ninetailes and bam you've won the weather war, rendering pokemon such as venasaur, sandslash and other weather abusers dead wieght and you can see why despite his many flaws how dangerous he can be for weather teams. Add genesect to that you can smash and trap mons, genesect weakens mons to the point dugtrio ko's them and you can't do anything because duggy has arena trap, and as an added bonus every single levitate or flying typing in ou genesect carries a super effective move for.
Yes dugtrio has some flaws namely being weak and frail, but his speed and ability allow him to be game changing if given the chance, epecially paied with genesect.
O - I am an Atheist and proud of it! Copy and paste this if you are too. - O