Do you only get the jewel after the event ends? Didn't get mine just there.
Seems like it, I didn't get one yet either.
I did one run with both powerups and got #28 out of about 3800 but I'm sure I'll get bumped down fast. Most of the top placed people have Xerneas and Mewtwo, and I have neither of those yet. Just gave Xerneas a try and only got it down to like 75%, lol.