One time I was showing my friend Pokemon OR, since he was gonna get an AS soon. I showed him Littleroot town, and found a Mewtwonite X! I totally did not know I would get it there. Then, I went on over to Route 101 and told him about hidden pokemon. There, there was a hidden pokemon I had not caught yet. My same friend said that it was a Zorua before we saw the silhouette (either wishful thinking, or he is very good at distinguishing the cry or the head), and I said it must have been a Lillipup. I was so wrong and it surprised both of us good.
Then, on another day with the same friend, he wanted to see a Pokemon Contest. I entered Master Rank Beauty with my Altaria (which was his third time), and we were so, so surprised to see Wallace out of nowhere.