|Profession||Employee of Earth's Government|
|First appearance||A Taste of Freedom|
|Voiced by||David Herman|
- "And if we don't want to pay our taxes, why, we're free to spend a weekend with the Pain Monster!"
- ―Richard Nixon about the Pain Monster[source]
The Pain Monster is a monster that Richard Nixon hires to spend a weekend with anyone who does not pay their taxes on time. Despite a fearsome name and appearance, it has a pleasant and cheerful voice.
"See you April 15, folks!"