Side Effects

Side Effects is the twelfth episode of Ben 10..

Plot
A man named Clancy, who has the power to control insects tries to take revenge on Councilwoman Liang because she wants to tear down the building where he and his insects live. Meanwhile Ben has to deal with the strange side effects a cold he gets after staying too long in a freezer truck has on his alien forms. Ben as Wildmutt can't smell, preventing his senses from working, Fourarms was orange, not as strong and really smelly, and Heatblast was blue and red, and projected cold. In the end, Clancy was defeated, Ben is healed... but Gwen gets his cold.

Major events

 * Ben and the gang first encounter Clancy.
 * Ben uses sick versions of his aliens.

Debuts

 * Clancy

Characters

 * Ben Tennyson
 * Gwen Tennyson
 * Max Tennyson
 * Councilwoman Liang

Villains

 * Clancy

Aliens used

 * Upgrade
 * Wildmutt (sick)
 * Fourarms (sick)
 * Heatblast (sick)

Trivia

 * The trios twelfth stop is Chinatown.
 * No one requires radiation protection despite direct exposure to radiation and the fact they are later shown necessary during corrodium exposure and in a nuclear plant during Too Hot To Handle.
 * Ben gets a cold again in The Secret of Chromastone.
 * It is learned that if Ben gets a cold, it effects his aliens as well.