>>20322884It isn't just that they're weak, they're REALLY damned weak.
You need to start off with Wurmple who can't take a hit from nearly anything and whose flip effect won't work if it gets flipped then destroyed before its effect activates (because that's how the game works, Brain Jacker and Parasite Paracide work the same way).
Then you get to Silcoon/Cascoon who are also incredibly weak AND have to keep them on the field for three of your opponents turns. And to what end?
You get Beautifly/Dustox, who are literally pointless because they do exactly the same thing as Silcoon/Cascoon with no additional benefits. It would actually be a better idea to just keep Silcoon/Cascoon on the field and use the space saved from keeping their final forms out on pretty much anything else.