At the end of the battle, Cascon will get exp. Cascoon, like many Pokemon, evolves when it reaches a certain level; through gaining experience points. In Cascoon's case, it evolves into Dustox when it reaches level 10 or higher. The methods above can be used to raise Cascoon's level. Do not confuse Cascoon as the Pokemon with the branch evolution - it is Wurmple that evolves into either Cascoon or Silcoon. Fb.2176887817878.