Veneon's bulkiness and ability mesh really well together. Its survivability allows it to stall out turns of poison. In addition, it has useful utility that provides support for the team. Its low HP stat makes it less ideal for wish-passing, but it has the ability to do so if necessary. It may run both Physical Defense or Special Defense depending on the needs of the team. Knock Off is used over Corrossive Gas so as to not be blocked by Knock Off. Encore creates opportunities to force a switch which can also allow you to poison another Pokemon or stall for more turns. Haze is useful for late-game wallbreakers set-up sweepers such as Kingambit and Volcarona.