Koopa the Quick

"Well, if it isn't Mario! Long time no see. You've put on a few pounds since I last saw you. Too much pasta and lounging, huh?"

- Koopa the Quick

Koopa the Quick is a Giant Koopa that Mario can race twice for Power Stars in Super Mario 64 and its remake. He is one of the competitor characters in the game along with the Big Penguin. According to what he says, his home is the "huge" variation of Tiny-Huge Island, which explains his size.

Super Mario 64
"You must be strong. And pretty fast. So, how fast are you, anyway? Fast enough to beat me...Koopa the Quick? I don't think so. Just try me."

- Koopa the Quick

In Super Mario 64, Mario first meets Koopa the Quick on the Bob-omb Battlefield after defeating the Big Bob-omb. Koopa the Quick appears only in the mission Footrace with Koopa the Quick. He is seen at the entrance of the stage and will challenge Mario to a race from there to the top of the mountain, where the Big Bob-omb originally resided. Once Mario accepts his challenge, the race will start. If Mario makes it to the top of the mountain first and the victory jingle plays, he will have to wait until Koopa the Quick makes it to the top as well to receive a Power Star. However, if Mario loses to Koopa the Quick, he will have to return to the Mushroom Castle, reenter the stage, and try again. Also, Mario cannot use a cannon to get to the top of the mountain faster, as Koopa the Quick will consider it cheating and will not give him the Power Star. However, using either of the warps will not affect the race. Somewhat hypocritically, Koopa the Quick himself cheats, as he takes a shortcut up a slope too steep for Mario to climb normally.

Koopa the Quick is next seen on the "huge" side of Tiny-Huge Island near Windswept Valley in the mission Rematch with Koopa the Quick, where he will challenge Mario to a rematch for another Power Star. This time, Koopa the Quick is much faster and more difficult to beat. Again, the race will start if Mario accepts the rematch. Mario must also be careful not to get blown off the Windswept Valley bridge on his way to the flag. Once he beats Koopa the Quick, he will receive another Power Star. If Mario enters the "tiny" side of the island, then the player can find an especially small Koopa Troopa that would be in the same location as Koopa the Quick. On this island, if Mario loses to Koopa the Quick, he can simply use one of the pipes to go to the Tiny Island, and then use the pipe again to go back to the Huge Island, where Koopa the Quick will be back at the start of race.

Super Mario 64 DS
In Super Mario 64 DS, Koopa the Quick is redesigned to look like the other "modern" Koopa Troopas. He seems to recognize Mario, as opposed to having to introduce himself like in the original game. In this game, he instead holds his races to help Mario lose weight. Nothing about his races has changed, but he will race only Mario. However, he cannot tell the difference between Mario and characters wearing Mario's cap. Also, if Yoshi, Luigi, or Wario loses his Mario disguise and finishes the race, Koopa the Quick will claim that he is the winner since Mario has technically not shown up, but if one of the three player characters beats him, then grabs Mario's cap, Koopa the Quick will award that character the Power Star. Also, if the player finishes the race without their Mario disguise, then leaves, grabs a Mario Cap, and returns to the finishing point, Koopa the Quick will act as if the player has lost. While the player still cannot use a cannon in their favor, they can use the Wing Cap if they are wearing it while starting the race; flying with it will still count as a loss.

Trivia

 * During the development of Super Mario 64, the player originally raced against a rabbit, but it was replaced by Koopa the Quick due to the rabbit being too fast.
 * Despite the size difference, Japanese materials treat Koopa the Quick interchangeably with the game's Koopa Troopa enemies.
 * The secret to Koopa the Quick's speed on Tiny-Huge Island is his "Koopa Mach 1 Sprint" shoes or, in Super Mario 64 DS, "Supa Koopa Sprint" sneakers, on which he spent all of his cash. Neither is mentioned in the original Japanese script or the French translations, though the German, Italian, and Spanish translations retain the reference.
 * In the French translation, Koopa the Quick asks Mario at one point if he has been training for the Olympic Games; the reference is removed in Super Mario 64 DS.
 * While Koopa the Quick does not appear in Super Mario Odyssey, there are Koopa Troopas named the Roving Racers that challenge the player to a race in most kingdoms.