Vector

Vector the Crocodile, usually just called Vector, is the loud-mouthed leader of the Chaotix Detective Agency which he runs with his friends Espio the Chameleon and Charmy Bee. Never seen without his trademark headphones, Vector is always looking for jobs that pay, but would never refuse to help someone in need for free. Despite regularly getting into arguments due to his directness, Vector is a clever detective ready to solve any mystery. In the Sonic the Hedgehog series, he debuted in Knuckles' Chaotix and has become a recurring character ever since being brought back for Sonic Heroes. He is known for appearing in Mario & Sonic at the Olympic Games and its' subsequent sequels as a playable Power type character, but has also made minor appearances in the Super Smash Bros. series. In the Mario & Sonic series, he acts as a rival to both Bowser and Donkey Kong.

Mario & Sonic at the Olympic Games
Vector appears in the first game of the series, Mario & Sonic at the Olympic Games. As a Power type character, he can excel in any event that requires strength, but is more difficult to use in running events as a consequence. He also has his own swimming stroke, called the Crocodile Paddle. His main rival is Bowser, whom he has to beat in the Mission Mode in both the Wii and DS version. Clearing all the mission will award the player with the Vector Emblem, while getting a Gold Medal in every Event with him will unlock the Vector Crown.

Vector's missions in the game:

Wii version:
 * 100m Freestyle: Aim for the specified time! - Finish with a time between 48 and 51 sec.!
 * Single Sculls: Beat your rival! - Finish before Bowser! (Your overall place doesn't matter.)
 * 4x100m Freestyle: Finish in the specified placing! - Finish in 2nd place!
 * Dream Table Tennis: Beat your rival! - Defeat Yoshi!
 * Skeet: Shoot the fast targets! - Shoot down 3 or more targets that are flying at high speed!
 * Final: Dream Race: Finish in the specified placing! - Finish in 2nd place!

DS version:
 * 100m Freestyle: Finish in 2nd place, within 50 seconds!
 * Hammer Throw: Perform a GREAT throw!
 * Trampoline: Earn GOOD ratings 8 times in your performance!
 * Fencing - Individual épée: Overcome a 5-point handicap and win!
 * Dream Canoe: Use items on all of your opponents.
 * Final: Dream Table Tennis: Beat Bowser when he's in top condition!

Mario & Sonic at the Olympic Winter Games
Vector returns as a playable Power type character in Mario & Sonic at the Olympic Winter Games. He also gains two new special abilities: When using the Head Slide, Vector falls down on his stomach head-first and moves like a swimming crocodile to accelerate or break through obstacles. Exclusive to the Rocket Ski Jump event in the DS version, Vector can blow up his Gum Balloon to use air streams to his advantage and move at a faster pace. In the Wii version, the Vector Emblem can be unlocked by earning a Gold Medal in every event with him, while in the DS version it is rewarded if the player clears ten missions in Adventure Tours with Vector. A Vector suit for the player's Mii can be bought in the Christmas Village, giving the Mii Vector's stats.

Adventure Tours
In the Adventure Tours mode in the Nintendo DS version, Vector is first mentioned in Cubyrinth when Charmy refuses to open a gate unless they bring his friend with them. Later in Icepeak, Vector is seen next to a mission sign and becomes irritated when Toad calls for him loudly. Upon seeing Mario and Sonic, he greets the gang and becomes curious about Donkey Kong. After a short conversation about music, Vector asks Donkey Kong for a Short Track 500m race to honour their first meeting. After losing to the ape, Vector admits the Chaotix actually came to do research about the mysterious Whitestones, but he got caught up in training for his favourite event. He then decides to join the group on their adventure to have an alibi in front of his two colleagues. He also shamefully remembers having abandoned Charmy in Cubyrinth, so he asks them to head there next.

On their way, they meet Espio, whom Toad tells about Vector's performance on the Short Track 500m event, breaking his secret. Espio is angry at Vector for neglecting his duties, but is willing to finish their research alone. Back in Cubyrinth, Charmy is still guarding the gate and Vector feels sorry for him, but quickly gets mad when the bee refuses to open, believing Vector might be an imposter due to not remembering the password. However, Vector then recalls they did not agree on a password, but on a quiz about the Olympic Games, which triggers Vector's minigame "Quiz Time". After answering five questions right within 45 seconds, Charmy is finally persuaded and opens the gate, happy to see his friend again.

With his colleagues handling the Whitestones investigation, Vector tags along with the others and later cheers on Mario and Sonic during their final confrontation with Dr. Eggman and Bowser. Afterwards, the group decides to continue their adventure together and Vector dares to beat everyone in the Olympic events.

Mario & Sonic at the London 2012 Olympic Games
In the story mode in the Nintendo 3DS version of the game, Sonic arrives at the Volleyball court and is almost killed by Bowser as he surprise attacks. Knuckles the Echidna and Vector the Crocodile helps out and challenges him to an event and lets Sonic go. They defeat him and he runs away to escape before Sonic crushes his machine. The Wild Ones destroy the machine and Sonic and Tails move on.

Mario & Sonic at the Sochi 2014 Olympic Winter Games
Vector appears again in Mario & Sonic at the Sochi 2014 Olympic Winter Games. He returns as a Power type character.

Mario & Sonic at the Rio 2016 Olympic Games
Vector appears again in Mario & Sonic at the Rio 2016 Olympic Games as a playable Power type character in the Wii U and 3DS versions as well as in the Arcade Edition of the game. In the 3DS version, he is exclusive to the Table Tennis and Golf Event and its Dream event counterparts.

Profile
''Rough-and-tumble Vector is a crocodile that loves money, which means he wants that Gold Medal more than anything. With incredible Power skills, he'll perform well in the throwing events and, given his unique swimming stroke, can excel in the pool as well.''

Profile
''Vector the Crocodile is large and strong, and heads the Chaotix Detective Agency. Vector's Head Slide abitily on the Wii and DS, and Gum Balloon ability on the DS will put him toe-toe with the other contestants as he goes for #1!''

Profile
With a love of all things gold, this crafty croc will use his impressive strength to snag as many Gold Medals as possible.

Trivia

 * Coincidentally, Vector bears a resemblance to the Kremling species, which may be the reason for his rivalry with Donkey Kong.
 * Vector, along with Charmy Bee, has only appeared in three games before the Mario & Sonic games: Knuckles' Chaotix, Sonic Heroes, and Shadow the Hedgehog.
 * With ten overall playable appearances, 50% of the games Vector is playable in are from the Mario & Sonic series.
 * In his CGI models for Mario & Sonic at the London 2012 Olympic Games and Mario & Sonic at the Sochi 2014 Olympic Winter Games, Vector's arms are miscoloured dark green, though it seems they tried to hide this detail in his artwork for the latter game by giving him a pose which barely shows his arms.