RE: Pokemon Rumble Blast : Tornadus code

Okay, so I put in a code on my rumble blast for a Tornadus to appear.It said it would appear in 3-2. So I started looking around and don`t see any outside the levels. So I go into the autumwood level. What do I see? A Tornadus. However I can`t do anything to it and it can`t do anything to me. Then after about ten seconds it goes away. So what just happened? Please answer in comment.