Welcome to Smogon! Take a moment to read the Introduction to Smogon for a run-down on everything Smogon, and make sure you take some time to read the global rules.
Lovrina has one of my Pokemon to give to me so would this work:
I give you the Mismagius for MattJ's weavle and you give a clone back to me a long with My hippowdon that Lovrina has.