To get pokerus clone a lv. 10 totodile then raise the one that you didnt clone to crocanaw lv. 30 dont let it evolve at lv.30 clone the lv. 30 crocanaw go to your pc it will show a crocanaw its name will be ect. that is your pokerus if you look at its stats it will say lv. 100 and pokerus !! dont use it in battle though your game will freeze!! the good thing for pokerus is it doubles your lv. 30 crocanaws exp. points!!!!!!!!!!!