I just got my game today, and I'm loving it so far. I was looking around the farm for a Riolu (still haven't encountered one) and a shiny Mareep appeared! This is only the second time I've randomly encountered a shiny and my first time to catch one. I'm extra happy 'cause I love Mareep and was gunna have one on my team anyway...
Looking for: An English Ditto for my Black version
Offering: A Japanese Ditto from Black
My Pokemon Black FC: 3481 8461 8569
My Heart Gold FC: 4512 5133 5815
My Diamond FC: 4211 8500 2587