Mega Koopa

The Mega Koopa is a giant Koopa Troopa in Super Paper Mario that got a Mega Star. The Mega Koopa is an 8-bit Koopa Troopa from Super Mario Bros. that grew to epic porportions.

Once an ordinary Koopa Troopa, he sees Mario coming and runs for his life. He hits a block containing the Mega Star and turns huge (using the same animations that any other character would when they used a Mega Star). Mario or Peach (Bowser and Luigi will also encounter it once they join later on) needs to get giant to defeat the Koopa, but he can be defeated by an explosion of Boomer and Bowser's firebreath. Oddly enough, the Mega Koopa is 3D instead of flat, though all "Mega" characters may have this characteristic. This Koopa is not to be confused with a Gargantua Koopa Troopa.

Statistics
HP: 1 Attack: 2 Defense: 1 Tattle: That's a Mega Koopa... Enemies don't get any bigger or more pixelated than this...  Max HP is 1, Attack is 2, and Defense is 1. It's probably best if you avoid it, unless you can match its size... How did a Koopa Troopa grow to be so big...?

Trivia

 * This is perhaps the only occurrence of an enemy using a power-up item in a Mario game, though they once were going to in another platformer, New Super Mario Bros.