Might as well nominate something of my own
Cloyster @ White Herb
Trait: Skill Link
EVs: 252 Atk / 4 SAtk / 252 Spd
Naive Nature (+Spd, -SDef)
- Shell Smash
- Icicle Spear
- Rock Blast
- Hydro Pump
Tested this out on a team of mine (with the same Gliscor) and it worked pretty well. Basically, Gliscor draws Ice attacks like the fucking plague, Genesect + Mamo being the most common users. Cloyster can shrug off these ice attacks, keep its Substitute intact, and Shell Smash, giving you free rein to sweep with ease. If you were lucky enough to keep your Substitute up, it means that revenging you is 100% harder since they have to break the sub AND strip off 100% of your health. The obvious flaw with this reciever, is the fact that against non choiced water types (which commonly carry Ice Beam and Surf) your use is going to be limited, although you can simple back a second reciver as a water resist, to cover your bases no matter what,
To be clear, whatever we decide, I personally would prefer we use something that can actually USE the substitute, ideally keeping it intact, which makes it more successful. This is prolly why I am not quite such a fan of Breloom which is frailer, and therefore has more of a chance of the sub breaking during the pass, which perhapes another pokemon could use better.
Just my 2 cents