Effective way to surprise people. I think there isn't much to do with Aron, as it is a FEAR pokemon. just but in in Trick Room/Sandstorm, and let it do what it does best. Piss people off.
"We must treasure these (Unown), since they are us at our very core...
ALSO, DID YOU KNOW THAT YOU CAN MAKE WORDS OUT OF THEM? THAT'S PRETTY COOL!!!!!!!!"