"I'm not happy." You may have realized that the Mario universe is very happy. This is due to Sponge, an orange plumber with an even bigger moustache than Mario or Luigi, soaking up all the sadness in the world, making him depressed. Not helping his mood disorder is the fact that no one cares...

"Now I know how a meatball feels!" - Mario "That's Mama Luigi to you Mario!" - Mama Luigi