I'd love to go with a poison pure-type challenge too, since my team would be Arbok, Weezing, and Muk. (Think of what Ash would be if he killed Meowth and joined Team Rocket. )
EDIT: God, I can't believe I created this post around two years ago, back when Team Rocket still owned their poison Pokemon! Poryhedron, you have my support! *applauds*