Take a mon with Viability Rank of A- or higher in OU and give it a meme set that kinda works but is severely outclassed.

Sample:
Kartana @ Fightinium Z
Ability: Beast Boost
EVs: 252 HP / 4 SpD / 252 Spe
Timid Nature
IVs: 19 Atk
- Leaf Blade
- Smart Strike
- Sacred Sword
- Swords Dance

Viability Rankings:
http://www.smogon.com/forums/threads/usum-ou-ultra-viability-ranking-thread.3621329/