a fun but extremely gimmicky set I tried out on an alt was a very fun Sturdy+Shell Smash+Weakness Policy Carracosta. Though not the best thing in the world and pretty damn priority weak it is still a very fun mon to bring and has decent surprise factor though I do understand it is nothing but a gimmick I just kind of wanted to bring it up.
Carracosta @ Weakness Policy
Ability: Sturdy
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Shell Smash
- Aqua Jet
- Stone Edge
- Waterfall
Carracosta only reaches 326 Speed on an Adamant Smell Smash set, which even Rash Raikou can outspeed (though Timid Raikou can still outspeed if you're Jolly.)
I'd say go Jolly to outspeed threats like Tornadus and Cobalion and get far greater damage off than what you can with Adamant (ironically) since you can Waterfall rather than Aqua Jet as a last ditch attempt.
Waterfall actually does 69.4 - 81.7% on Virizion and Stone Edge does 82.7 - 97.2% to Toxicroak, both of which you'd expect to wall this set lol. Toxicroak can Sucker Punch but still.