If you've ever wanted a Serperior with its hidden ability, Contrary, now is your chance!
The Serperior can be obtained in Omega Ruby and Alpha Sapphire via a serial code mystery gift. The serial code is: POKEMON497 and can be used once per game. The Serperior is at level 50 and knows the moves Leaf Storm, Hold Back, Wring Out and Giga Drain.
The end date for this event is currently unknown but act fast and keep an eye on PokeBay for news about more events!