if you want a really good poison typed glass cannon though, you should go for Crobat. Acrobatics, confuse ray, poison fang and air slash (or hypnosis/brave bird by breeding) will make a LOT of fights later on much easier due to that it outspeeds almost everything, making it easy to confuse others and having a chance of inflicting toxic poison with poison fang, while acrobatics literally destroys everything considering crobat's attack stat is ridiculous.
the only thing is that it's a real glass cannon, so it can usually only survive one hit if a move is super effective. it can easily inflict status effects before you can give the other a chance to do any damage though because of its speed, so make use of that.