I just discovered a glitch involving Gengar lv. 40's Power of Darkness :
http://www.pixenli.com/images/1376/1376751131047852200.jpg
Resetting after you send the last of your opponent's Pokémon in your opponent's deck triggers similar effects to the Zapdos lv. 68 glitch.
BUT !
If you do certain actions when the glitch has been activated through Gengar lv. 40 (such as using Computer Error or Challenge), the game will start to really act weirdly, and you will be able to control BOTH players.
As usual, you will have a lot of Energy cards on the field.
Here are some pics of the glitch in action :
http://www.pixenli.com/index.php?phppage=voir_galerie&id=1376752251032461000
I'll make a video in the next few days