Man does this thing have bad stats and typing. It does have some cool tricks though, with Baton Pass, Quiver Dance, 91% accurate Hurricanes, and Sticky Web. It might make a good showing in RU as the premier Sticky Web user, but if its typing and stats hold it back too much it will probably be NU.
EDIT: Actually, is it confirmed that Vivilon can even learn Sticky Web? If not, then it's most likely NU.
3DS Friend Code: 5069-4167-2407 You know what they say, the more the merrier!