Rival

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The rival system is a recurring game mechanic in the Mario Kart series where one or more computer-controlled opponents are given a massive advantage to ensure the point standings in the tournament grid are always close. Some implementations of the system may also dictate the rank order of the entire grid and not just the CPU closest to the player. It is usually enforced through rubber band AI, a racing game convention where opponents get a speed boost (often beyond what the in-game statistics for the character would allow) when they fall too far behind the player. Rival characters may be given other advantages such as recovering faster from hits and getting better item probability.

History

Super Mario Kart

The rivals are expected to finish in a particular order. In this case, though, Princess got a lower spot than normal.

In Super Mario Kart, rivals contain one very fast driver, one fast driver, one medium driver, one slow driver and three very slow drivers. It is notable that when one of the three slowest drivers gets hit, that kart will keep its place, while when one of the faster cars gets shot, it will usually resume its previous place very quickly unless unable to catch up fast enough before the race ends. For this reason, the drivers (except the human racer) will (if unaffected) always finish in the exact same order. If the human-controlled player tries to hit an opponent, said opponent jumps over the item a majority of the time. The rivals are also not determined in pairs, so that even if Donkey Kong Jr. is Mario's rival, Mario will not be Donkey Kong Jr.'s rival, as shown in the table below.

The rivals for each driver are always the same, the list below will be in that exact order for the first race. It is possible to change the order if the rivals can't recover their place at the end (for example, if someone is playing as Luigi and Yoshi finishes last, Yoshi will then become one of the three slower drivers while everybody takes the next position up). It happens mostly on 100cc and 150cc.

The rivals are determined by the current points standing, meaning that if Yoshi was still only second to the player, he will boost back to first position from the start.

Character	Rival Order
	Very Fast	Fast	Medium	Slow	Very Slow
Mario	Donkey Kong Jr.	Princess	Yoshi	Luigi	Toad	Bowser	Koopa Troopa
Luigi	Yoshi	Mario	Bowser	Koopa Troopa	Princess	Donkey Kong Jr.	Toad
Princess	Bowser	Toad	Mario	Donkey Kong Jr.	Luigi	Yoshi	Koopa Troopa
Yoshi	Koopa Troopa	Donkey Kong Jr.	Princess	Bowser	Mario	Toad	Luigi
Bowser	Mario	Luigi	Princess	Yoshi	Donkey Kong Jr.	Toad	Koopa Troopa
Donkey Kong Jr.	Toad	Bowser	Koopa Troopa	Luigi	Princess	Mario	Yoshi
Koopa Troopa	Luigi	Yoshi	Princess	Mario	Bowser	Donkey Kong Jr.	Toad
Toad	Princess	Donkey Kong Jr.	Mario	Yoshi	Luigi	Koopa Troopa	Bowser

Mario Kart 64

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Mario Kart 64 and most of the subsequent installments (beside Mario Kart: Super Circuit) until Mario Kart 7 employ a simpler variation where one or two random opponents are selected at the start of a tournament to be of much greater skill than the other racers. Rival racers have strong rubber-band AI.

Mario Kart: Super Circuit

Mario Kart: Super Circuit features a preset order of CPU opponents from slowest to fastest for each character in Grand Prix mode. In Quick Run mode, the orders are reversed, except in the first track of each cup. When playing Grand Prix in multiplayer, the rival order depends on the first player's character.

Player	Fastest CPU	2nd-fastest	3rd-fastest	4th-fastest	3rd-slowest	2nd-slowest	Slowest CPU
Mario	Donkey Kong	Bowser	Luigi	Yoshi	Peach	Toad	Wario
Luigi	Wario	Toad	Yoshi	Mario	Peach	Donkey Kong	Bowser
Peach	Luigi	Bowser	Donkey Kong	Yoshi	Mario	Toad	Wario
Toad	Peach	Luigi	Yoshi	Mario	Wario	Donkey Kong	Bowser
Yoshi	Peach	Luigi	Toad	Mario	Wario	Donkey Kong	Bowser
Donkey Kong	Yoshi	Bowser	Toad	Luigi	Peach	Mario	Wario
Wario	Bowser	Donkey Kong	Yoshi	Mario	Luigi	Peach	Toad
Bowser	Donkey Kong	Peach	Mario	Yoshi	Toad	Luigi	Wario

Mario Kart 7

Mario Kart 7 returns to a system similar to Super Mario Kart, although more simple as two characters are set instead of single characters followed by another single character, etc..

Each character's rivals will always be the same; for example, Bowser will always appear in a Grand Prix if the player is playing as Mario. However, if a set character is supposed to be unlockable, the set character is replaced by a default character until the unlockable character can be used. That will make the default character a third rival that occasionally appears in the race. Wario is the only character to break this rule due to both of his rivals being starting characters.

Character	Rivals	Third Rival
		N/A
Male
Female

Mario Kart 8 / Mario Kart 8 Deluxe

Mario Kart 8 uses a Rival system similar to its predecessor, with several alterations. A set rival system is present only in the Grand Prix mode of the game; all other modes, including single player VS and battle are not affected and have randomized CPU opponents. Furthermore, only the original characters from the E3 build of the game receive a set system of rivals (Mario, Luigi, Peach, Daisy, Yoshi, Wario, Donkey Kong, Bowser, Koopa Troopa, Waluigi, Toad, and Toadette). The rest of the playable characters do not have a rival system of any sort, and all of their opponents in any modes are randomized. If there is more than one player participating in a Grand Prix, the first player's character determines whether there is a rival system or not, and what specific rivals the game gives the character. If other players choose the rival characters, the rivals are replaced by another, random character.

Player	Opponent(s)	Player	Opponent(s)	Player	Opponent(s)

Mario Kart 8 Deluxe uses the same system, however more characters have been given rivals though a few don’t have any rivals at all.

Rival Order
Player	Opponent(s)	Player	Opponent(s)	Player	Opponent(s)
					None
	None
	None				None