Shadow Kirby

Shadow Kirby is a copy of Kirby that exists in the Mirror World, debuting in Kirby & The Amazing Mirror. At the beginning of the game, Kirby and Shadow Kirby believe each other to be enemies. Shadow Kirby appears once in all of the worlds to attack Kirby, and if Kirby defeats him in combat, he will drop a random power-up, such as invincibility or an extra life.

However, Kirby discovers Shadow Kirby wants his world to be saved just as much as Kirby wants his own world to be saved, so they ally with each other to take down the one true villain: Dark Mind.

During the fight with the final boss, Dark Mind, Shadow Kirby will appear if Kirby loses the Master Sword and throw it back to Kirby.

At the end of the game, it is revealed that the only reason he attacked Kirby is that he just wanted to protect the Mirror World and keep any foreign being out of it. Shadow Kirby decides to continue to protect the Mirror World after Dark Mind is defeated just in case it returns. His relationship with Dark Meta Knight is not elaborated on.

Later, Shadow Kirby appears as the seventh and final opponent of Kirby Fighters in Kirby: Triple Deluxe.

Appearance
In Kirby & The Amazing Mirror, the original appearance of Shadow Kirby is like that of Kirby, but colored dark gray with black feet (or shoes). In Kirby: Squeak Squad, using "Shadow" paint on Kirby makes him look like Shadow Kirby. In Kirby: Triple Deluxe, his eyes are white and his skin takes on an alien purple shade, as if his skin is made of outer space.

Abilities
Shadow Kirby can use copy abilities just like Kirby. In Kirby & The Amazing Mirror, he doesn't wear hats to show what copy ability he has, much like Kirby in earlier games. In Kirby: Triple Deluxe, he will mirror the ability the player selected at the start of Kirby Fighters by clearly wearing a cap.

Trivia

 * In Kirby & The Amazing Mirror, Kirby can inhale and swallow Shadow Kirby for a copy ability (which depends on the copy ability Shadow Kirby is using). However, he will later appear unharmed regardless if Kirby inhaled him or not. He shares this trait with other inhale-able characters who have a noticeable role in the story.
 * It is unknown if the Shadow Kirby from the Kirby Fighters sub-game of Kirby: Triple Deluxe is the same as the original Shadow Kirby, as it has a redesigned appearance. It could be the same one, as there are other clear references to Kirby & The Amazing Mirror during King Dedede's playthrough. However, as its role occurs outside the main storyline, it remains uncertain.

Sprites
Shadow-Kirby