Super Paper Mario/Fridge

Fridge Horror

 * The World of Nothing in Super Paper Mario is creepy enough as it is, with the entire world destroyed (Or, more accurately, erased), but then you go to the Underwhere, which is the land of the dead. None of the people from Sammer's kingdom there. Then, a little while later, you find out that the land of the dead is going to be erased too. ... This is the part where it borders on Nightmare Fuel. In a Mario game.
 * There's a Whakka in this game, which just so happens to be the last of his kind. You can whack his head to gain bumps, which make amazing healing items. Whack him too many times, you kill him. However, the Flipside Arcade has a lot more Whakka bumps for you to buy. Wait, I thought that one Whakka was the last of his kind. Where did they get the bumps... Oh fuck.
 * At the beginning of the game, Count Bleck sucks Bowser's army into his castle with a black hole. When you reach Castle Bleck, there aren't a huge number of them, but there are a lot of Dry Bones...

Fridge Brilliance

 * Mr. L.'s basic personality traits are sarcasm, greed, jealousy, and cockiness. These traits have appeared before as Luigi's faults... All Mr. L is is the personification of Luigi's faults, the traits that keep Luigi from being too powerful. As a result, he can never win, because he's just an exaggeration of someone's faults.