Cascoon. When I was a kid I was training my little wurmple to be a beautifly. And along came this ugly piece of garbage. I was so mad whenever my wurmple evolved into a cascoon and not a silcoon. I will forever despise this pokemon. On top of that they take 15 years to kill if they use harden every turn in the wild :/
just a little hint
boy Wurmples usually evolve into Silcoon
girl Wurmples usually evolve into Cascoon
really should be the other way in my opinion but could depend on the game too, I know in my sapphire I usually get a silcoon with boy wurmples and cascoon with girl wurmples