Get a Burmy, it has to be female, train it to level 20, it will evolve to Wormadam. There are 3 Cloaks for Wormadam , also 3 different types for it, plant cloak, sandy cloak and trash cloak, plant cloak is part grass, sandy cloak is part ground and trash cloak is part steel. To get plant cloak, train it in grassy areas, to level 20. To get sandy cloak, train it in a cave and trash cloak, train it in a building. If you have a male one, it will evolve to Mothim.