Get a nincada below level 20. Note: make sure you have the same type of ball you caught it in have an empty space in your belt for shedinja. Raise your nincada to level 20, he has to evolve as soon as he is done evolving look in your party he should be in there( if you did this properly). He is almost indestructible with wonder guard. He has 1 hp but indestructible but he can be fainted by flying moves (pokemon) so have fun with your new shedinja!