Kamek

Kamek was Bowser's guardian and one of the enemies in the past Mushroom Kingdom. His first appearance was in Super Mario World 2: Yoshi's Island for the SNES, where he kidnapped Baby Luigi and left Baby Mario tumbling down to Yoshi's Island. He later sent out Toadies to search for Baby Mario, whom Yoshi already saved. Yoshi protected Baby Mario, and went off to find Baby Luigi and bring the duo to their parents. Even though many might consider him one of the main enemies in the game, he oddly isn't a boss, nor do you ever fight him.

Kamek can do various magic techniques that other Magikoopas can't, such as being able to make enemies amost ten times there regular size.

Kamek appeared in many cameos, and enemy appearances in a few games, but when Mario Kart 64 was in development, Kamek was in a few photos as a playable character, but was later replaced by Wario. If he appeared as a playable character in the game, this could have changed how popular he is today.

In the game Mario & Luigi: Partners in Time, he appeared as a boss character, and was also together again with Baby Bowser. He has also appeared in games such as Super Mario RPG: Legend of the Seven Stars, and Yoshi's Safari, along with alot of cameo appearances such as in a few of the Mario Kart Games.

Kamek's first game where he appears as a boss is in the 1996 SNES game Tetris Attack. The game put him as the second to last boss right before the almighty Bowser. In the game, Yoshi and his pals had to beat him by using the puzzle mechanics that were added in the game.

In the game Yoshi's Island DS, he is one of the main enemies in the game, though you'll never be able to actully fight him.