i have never seen onix although i have tried a gimmicky restalk, dragon tail, roar and combined with its alright speed and hazards can shuffle there team around surprisingly well (this was a couple of stages ago).
The biggest problem with gothrita is that it is inevitable that your going to get critted, everytime one has tried to set up on my umbreon (lol), or my roselia or lickilicky (only had body slam), it has been critted to death and because you're staying in for so long it will happen, there in a 6.125% (1/16) chance to get critted, it is bound to happen, other wise it would be a great set up sweeper
The biggest problem with gothrita is that it is inevitable that your going to get critted, everytime one has tried to set up on my umbreon (lol), or my roselia or lickilicky (only had body slam), it has been critted to death and because you're staying in for so long it will happen, there in a 6.125% (1/16) chance to get critted, it is bound to happen, other wise it would be a great set up sweeper