2nd Gen Fav Gen 2 Poison type..

[J-Pom]

even though there aren't a lot of options.

Crobat, by far. The other 3 are no where near as effective.

 

[strangerhypno]

Qwilfish is an underrated beast, it has a good typing and decent attack and speed. Later gens it gets intimidate and a good support movepool like toxic spikes

Spinarak is cute and Ariados has an awesome design and in movie 5 it was a good villain pokemon

Overall Crobat is probably the best gen 2 poison and definitely is the most popular

 

[Zeostar]

Crobat is the only one I like

Ariados is okay, just not very powerful.

 

[Cool_Porygon]

Crobat for me.

 

[Elixirloxx23]

I always liked Ariados's design, and a very underrated Pokémon too!