I also run Trick Room Mimikyu, but I don't see the utility of adding Curse: in my experience you can usually get more done with a STAB move.
Mimikyu @ Focus Sash
Ability: Disguise
EVs: 252 HP / 252 Atk / 4 Sp.Def
Brave Nature
IVs: 0 Spe
- Trick Room
- Shadow Claw
- Play Rough
- Destiny...