Kakuna is a Pokemon that is a bug. They evolve into the more better Beedrill. They do nothing but harden until they crack up and die or until a Bird Pokemon grabs one and eats it. Kakuna, like Metapod, were thought to be able to learn their previous forms' moves. For Kakuna people thought it could learn Poison Sting and String Shot which are the exavt same moves Weedle can learn but this is not yet confirmed. Bug Catchers often have Kakuna along with Metapod but since they suck they die VERY easily, more easily then Caterpie and Weedle being used together.