This happened to me at league:
I start with Cleffa no supporters and my opponent starts with a lone Mewtwo, I Eeek, get nothing good, I wake up, he drops a DCE amd donks me for the game, I know that happens alot but I need to put out there. Sorry if that method has been posted before.
Also, On the, I dunno, 'bout the 10th turn against Zekeels me (VVV) and my opponent were 4(him) to 5(me), he keeps using Juniper to get a Catcher to kill my only Oddish (that wasn't prized), he finds out they're all prized and scoops because he only has about 10 cards left. XP. Don't discard your deck unless ypur absolutley certain.