The above TR set didn't say what specific version it was, so doing my own:
Diancie @ Life Orb
Ability: Clear Body
EVs: 252 HP / 252 Atk / 4 SpA
Brave Nature
IVs: 0 Spe
- Trick Room
- Misty Explosion
- Diamond Storm
- Body Press
This set is made to try to break as many holes as possible as fast as possible, and then use Misty Explosion to bring in a teammate. Its fairy easy to use, esp given how well it synergizes with other TR abusers (eg SR Copperajah), just be wary of Vaporeon. Suggested teammates include well, SR Copperajah, Dhelmise, and weirdly stuff like Scarf Flygon cause its great at poking holes into teams. Fun set overall that I've been using for a few months.