While no one set can beat every pokemon, Gothitelles moveset can be tailored to trap and beat/cripple most pokemon, it's a very specific pokemon with a specific niche, but no other pokemon is this versatile when it comes to trapping.
The ability of Gothitelle teams to just trap practically any pokemon they have trouble with, using their own custom set, is just scary.
You mention shed shell, but that's really not that much of a worry of gothitelle compared to other trappers, you can put shed shell on skarmory, or even on tyranitar or heatran.. But it's just not realistic to have to put shed shell on a celebi, gliscor, hippowdon, gyarados, etc..
That being said, if one of those do carry shed shell, I'd actually much rather have a gothitelle that can't trap than a dugtrio that can't trap..
The ability of Gothitelle teams to just trap practically any pokemon they have trouble with, using their own custom set, is just scary.
You mention shed shell, but that's really not that much of a worry of gothitelle compared to other trappers, you can put shed shell on skarmory, or even on tyranitar or heatran.. But it's just not realistic to have to put shed shell on a celebi, gliscor, hippowdon, gyarados, etc..
That being said, if one of those do carry shed shell, I'd actually much rather have a gothitelle that can't trap than a dugtrio that can't trap..