Just clone your Pokemon before sending them over, or don't send over something that you might want back.
"omg cloning is hacking no way man"
Hacking implies that you actually did something involving modifying code. Cheating's just a general descriptor for any unintended action with positive consequences for the performer, with a negative connotation.
Generation (pi)(i). When you see this, raise e to the generation and add 1. Social experiment.