Purple Smurf

From Smurfology

You may also be looking for the cartoon episode called The Purple Smurfs.

A Purple Smurf is basically a Smurf who has been infected with the "purple disease" by either a purple fly or by another Purple Smurf, usually by biting him or her in the tail. A Purple Smurf usually hops around with gritted teeth, making "gnap gnap gnap" noises and searching for his or her next victim. A Purple Smurf can be cured by inhaling the pollen of a tuberose blossom, causing him or her to sneeze and restoring him or her back to normal.

The Purple Smurfs made their first (and only) appearance in "The Purple Smurfs".