Vespiquen-Vileplume is really good against Night March. It is also a good play into about every matchup...
I actually just got back from Wisconsin States where I went 5-0-2 in Swiss. I went up against 4 of them including google (top 32 in US) and Caleb (Top 4(?) in US). Each match against the 4 Night Marchers I lost the coin flip and went 2nd, but still managed to win 2-1 with the best of 3 matches.
I took 2nd after Swiss and continued into top cut where my first match was Night March. Lost the coin flip but still managed to pull off the 2-1 win.
Top 4 was a different story, Went against Night March piloted by Caleb (Who I beat in Swiss) and once again lost the coin flip. I managed to pull off 1 win but on the 3rd game I prized my 1 revitalizer, 1 DCE, and 2 of my 3 Vileplume. Being forced to discard the Vileplume on my opening hand (not having anyway to look through my deck to get my counts) I ultimately lost and wound up 3rd place.
It was a good run but the only sad thing is I lost all the coin flips in a match where the first coin flip usually decides the outcome.
And if I would have won that match my Finals match would have been against another Night Marcher.