Luigi

Luigi is an unlockable character in Super Mario 64 DS. He is not required to beat the game, but is needed to collect Power Stars that others can't get. He was captured by King Boo at the start of the game and the key to unlock his door is found in the level Big Boo Battle. He has average speed and somewhat low power, but high jump height (tied with Yoshi). He is able to scuttle after a jump and is overall the fastest swimmer of the four characters. He can also spin after backflipping, and can run on water for a few seconds before sinking. His Power Flower ability is Vanish Luigi, which lets him pass through thin walls and not be visible to most enemies. Lastly, he is the most manoeuvrable in the air out of the four characters.