Starite

Introduction
Starite is some sort of weird, otherwordly creature who showed up on the Mushroom Kingdom on a random Thursday night. Mario first caught it eating garbage on a dump in his house's front yard.

It turns out Starite is a Gem, an eerie alien with a glimmering gemstone embedded somewhere within its body. Starite was sent by an angry giraffe ( or a sad woman, I don't remember ) to the Mushroom Land for a reconaissance mission, but crashed after hitting Lakitu with its spaceship.

Now, it lives on Mario's yard, as he's too frightened to chase it off.

Here's a list of all of its marvelous abillities. Or most. Starite is so amazing, one cannot grasp the full extent of Starite's unique stariteness. See, there's even an adjective that describes Starite's greatness...
 * Scaring people off
 * Ticking people off
 * Making food rot
 * Exhaling nitrous oxide
 * Crying liquid gallium
 * Controlling people's thoughts
 * Communicating through telepathy
 * Being able to read the deepest of your thoughts
 * Slinking away quickly
 * Disappearing and reappearing when you least expect it
 * Summoning armies of tiny mud dinosaurs
 * Talking to beetles
 * Talking to Pikmin
 * Enduring this painful page
 * Being the best fictional character ever created in the 13.5 billion years that this Universe has existed, a beam of sunlight shone upon a dark, mischievous nighttime storm, something too marvelous and wonderful for us to bask and grasp
 * Barking