Creature de la Nuit is Madame Mousey's villain song in An American Tail: The Mystery of the Night Monster. She sings it during a meeting with her cat gang down in the sewers. The song is about how great she is, and that Nellie Brie should take her seriously.
MADAME MOUSEY: From the creature de la nuit
The poodle of Paris
And nowhere in the world is there a dog more smart than me
I'm clever, chic, and wise
Don't judge me by my size
And if you give me trouble
I will rip out both your eyes!
You're fools to mess with me
The creature da la nuit
Without me you were starving
Living on scraps and rice
MADAME MOUSEY: Now we're on our way to easy street
Soon we'll be rolling in mice
MADAME MOUSEY: C'est moi who rules the street
Powerful, yet petite
Don't try to double cross me
Or I'll break your stinking feet!
So don't make light of me
The creature de la nuit
I may appear a mere poodle
MADAME MOUSEY: But deep in my heart I remain
CATS: She remains
MADAME MOUSEY: A Pitbull! A wolf! A Doberman Pincher!
Or better yet--a Great Dane!
CAT 1: You know there's nothing like a Dane
CAT 2: But what about that there reporter?
MADAME MOUSEY: I will nab that nosey miss!
In a trap she can't resist
And then I'll give her pretty neck
A chic French twist!
So madmoiselle Nellie Brie
You must take me seriously
If Napoleon were a her with fur
He would be me!
I make no apologies Je suis
CATS: Not she!
MADAME MOUSEY: Un formidable enemy
CATS: That means she's bad
MADAME MOUSEY: You pressy pussy cats agree
I'm the creature de la nuit! En garde!