Instead of just saying Arbok, I'll go Gardevoir on this one. Gardevoir is purple like the gengar and the Arbok on your page/avatar, looks female-ish, and evolves from raltz, who was one of your favorites.
^^Uh oh, my post was beaten!
For you VictorRay, I'll say Drapion, since he's poison-type like your Weezing and looks pretty menacing--a kind of theme I see in your 6 person team.