The Magic Pen

The Magic Pen is the one hundred and fifty fifth episode from Season 1.

Plot
When Aliens misplace their magic pen, that can make anything it draws come to life. It comes into the possession of Dennis, who mistakes it for a normal pen. He tries to use it to draw a picture for his homework, before his teacher gets mad.

Trivia

 * After Dennis mentions his picture of a monkey, Margaret calls it revolting. This may be a callback to The Chimp when Boo Boo the chimp chased her to the Mitchell place.