Road to Black and White 2

In preparation for the upcoming release of Pokemon Black and White 2 I am replaying White version attempting to try out some of the Pokemon I didn't use in my few previous playthroughs. This started by choosing Snivy as my starter which I have decided is not a wise choice. The Snivy Panpour combo is not particularly helpful against the many early grass and bug types you encounter including the 3rd gym. I currently have 3 badges but am a wee bit stuck due to my teams complete inability to defeat N's Sigilyph. I just added Liepard to the team for this exact purpose. Here they are:  

 UPDATE: Went back to fight N and didn't even need Liepard, Sigilyph missed the air cutter and Scraggy killed him with a faint attack.