http://www.serebii.net/pokedex-bw/285.shtml Shroomish learns Mega Drain at level 16, not 17.
"I'm one of the freaks, the f4gg0ts, the geeks, the savages, rogues, rebels, dissident devils, artists, martyrs, infidels. Do we sit still under attack, or do we start pushing back? Never back up, never back down, and fight" - Otep
"Keep your voices raised
Keep your knuckles bloody" - Otep Fists Fall
It takes 5 years to figure out your first tattoo, 5 minutes to figure out your second, you're already thinking about your third during your second