About Johnny Test Season 3, Episode 6 :

In hopes of creating more time to study for a test for school, Johnny drinks an unstable isotope to get sick, but instead has a reaction which gives him red spots and a purple tongue. if not cured within four hours he will become bloated and explode. Then, in hopes of getting into a movie meant for adults, Johnny and his sisters create an invention which will cause him to grow a mustache. But Bling Bling's pestering causes Johnny to shoot the invention at him, which changes him into a monster resembling Bigfoot. Now they must save Bling Bling before he is caught by the army or the Canadian Mounties.