Animaniacs - Pinky and the Brain

Pinky: Gee, Brain, what do you want to do tonight?
Brain: The same thing we do every night, Pinky...
       Try to take over the world!
 
YW+D : They're Pinky and The Brain,
       They're Pinky and The Brain,
       One is a genius; the other's insane.
       To prove their mousey worth,
       They'll overthrow the earth.
       They're dinky; they're Pinky and The Brain, Brain, Brain, Brain, Brain.
 
Version 2 (Episode 9) 
Pinky: Gee, Brain, what do you want to do tonight?
Brain: The same thing we do every night, Pinky...
       Try to take over the world!
 
YW+D : They're Pinky and The Brain,
       Yes, Pinky and The Brain,
       One is a genius; the other's insane.
       They're laboratory mice.
       Their genes have been spliced.
       They're dinky; they're Pinky and The Brain, Brain, Brain, Brain, Brain.