I have to be honest, poison is one of the few types along with steel, ghost and fighting i use the least, as a result i tend to not have very many of each type i truly like. however there are a few i can say have weaseled their way into my heart and you might be surprised by them as well.
Like always legendary will not be included, (i don’t think poison has ever gotten a legendary.) I am less then a week into Pokèmon x-y and have yet to find or use a new poison so you will be unlikely to see on in this list for now.
6: 
Arbok and Serviper: These two tie in my book, because i actually like snakes. These are both well executed designs and arbok and ekens hold a little nostalgia for me too, being part of the first generation. I do love that ekens goes from a rattler to a cobra. Serviper is cool too it seems like it has a little untapped potential too. For being pure poisons the move sets aren’t bad, but them being pure poison is what normally keeps them out of my team, still both have grown over the years and arbok if trained right i think could be a threat…if not used by team rocket.
5: 
Muk: ok this one is another nostalgic one for me, i have never really used him or grimer because of their pure poison natures, but it was just so damn funny in the anime. All it really wanted to be is love and acknowledged and no one wanted to give it to him because he was a pile of sludge. Poor little unlove Muk, don’t worry I like you.
4: 
Skuntank: This is the last one on this Poison types i haven’t used on this list the next three i have. This one is an intriguing type mix to me Poison/dark. dark removes the psychic issue that Poisons have. but now fighting is in issue…there is just no winning some days. Still its rather cute for a skunk.
3: 
The nidoran family: This family is kind of a bad ass and history maker. the first family in this game to have a male and female forms, first pokèmon to have a gender Period. Trust me if you have never been in a battle with a member of the family consider yourself lucky because they are tough especially Nidoking. If trained right these guys can be a powerful threat to any pokèmon on the field even a psychic. What has kept them off my personal team as you have probably figured out by now it is still the poison typing, and now just to many choices out their.
2: 
Bellsprout: For a long while i avoided this family, but to be honest it almost made my grass type list, only beaten out by oddish because of the forth evolution. In gen I i completely ignored this pokèmon. In gen II i want to say with Crystal there was no easily access electric, i think i had picked Cyndaquil for my second go around on the gen II game so i despertly needed help with water, ground and quagsire, and bellsprout was my answer. I picked it up just after the first gym and bellsprout ran with me for quite a while earning it a spot on my list. while i don’t remember if it made it to my elite four run, i will always remember its help when i needed it.
1: 
Zubat Family: That is right i am one of those strange players that actually likes and enjoys having zubat on her team. My love for Zubat comes with Gen II again, with the introduction of crobat and leveling via friendliness. this can be actually a very long process, and it takes time and in that time you get to learn about your little mon. Zubat is actually a cool little bat, who has grown over the years, actually at this very moment in my current game X I have another zubat that just evolved into golbat, i named her Dopler. Doplar has already assisted in two gyms and is about to head into her third if it keeps it up it might make a spot in my elite four team at this pace. Its hard not be impressed a little by Zubat, for a family people dismiss really quickly because lets face it you couldn’t go 5 feet in a cave in previous generations without running into one, its not a bad little pokèmon. Plus look how adorable zubat is, it still the cutest of the three bat pokèmon. By the way zubat was on the list i wrote up before x-y came out, x just reinforced my love for zubat. that’s why she will always be my favorite poison type.
Gamerwoman 