Vector the Crocodile

Knuckles and Vector first met during one of Knuckles' many treks around Angel Island. Stumbling on the sleeping Crocodile, Knuckles ended up in a fistfight with him. Despite their initial antagonism, the two developed a grudging respect for each other which became friendship, particularly after Locke departed to join the Brotherhood of Guardians. Vector would later help Knuckles bring Mighty the Armadillo onto Angel Island, though their aircraft of choice-a contraption known only as the Gyro, was destroyed by Vector's lack of piloting skills.

Vector and Mighty would later be joined by Charmy Bee and Espio the Chameleon, the four of them becoming the original Chaotix, Knuckles' support group in defending Angel Island. Their first mission involved shutting down a theme park built and run by Dr. Robotnik's agent Renfield T. Rodent, who managed to imprison the Knothole Freedom Fighters-including Sonic the Hedgehog-and weaken Knuckles. Though Renfield was easy enough to handle, Vector and the others proved no match for Metal Sonic, who was only defeated when Knuckles and he both absorbed Power Gems and duked it out giant-sized. After Robotnik's plot was defeated, the Chaotix became Knuckles' official support team.

Despite this backup role, they proved themselves full heroes by battling the Fearsome Foursome and their leader, Mammoth Mogul, while Knuckles was absent dealing with a Roboticized Sonic, also known as Mecha Sonic. They would also be in the background as Knuckles searched for the mysterious Archimedes, and were later abducted by this unknown antagonist and taken to Angel Island's Grand Conservatory.

Vector and the others learned Archimedes' true identity, discovering him to be an ally and vouching for him with Knuckles. Unfortunately, they all soon fell prey to a piece of Knuckles' family history: the original Enerjak formerly the Echidna Dimitri. Using his power, he turned Vector and the other Chaotix into his loyal minoins, banishing Knuckles and Archie to Angel Island's desert. They managed to return to Enerjak's citadel of Nekronopolis, fighting Vector and the others and defeating them. The Crocodile and the others were then freed from Enerjak's control when the mad Echidna was launched into space.

The Chaotix faced no major threats again until after the Ultimate Annihilator erased the barrier between Mobius Prime and the Twilight Zone, freeing the Dark Legion, a group of cyborg Echidnas founded by Dimitri's descendants, to begin their campaign of domination. After battling these enemies valiantly, the Chaotix were able to drive them from their headquarters. However, they soon faced the return of some old foes, Mammoth Mogul and the Fearsome Foursome. Using his magic, Mogul disguised his minions as members of the Freedom Fighters to trick the Chaotix and the Chaotix to trick the Freedom Fighters, all in a bid to lay hands on the Sword of Acorns that Knuckles had recently retrieved. Though initially the two forces were fooled, Sally Acorn and Archimedes were able to cease the infighting and get the two groups to cooperate. Vector joined the others in attacking and defeating the Fearsome Foursome and Mammoth Mogul, only for the latter to escape with the Sword. Vector, however, soon found himself faced with other problems: the return of the city of Echidnaopolis and the uneasy alliance between the Chaotix and a rogue Dark Legionnaire named Julie-Su who he distrusted due to having previously been attacked by her while she worked for the Dark Legion.

Once the Echidnaopolis crisis had been resolved, Vector joined his friends in moving into the city, hanging out at the local food court. Not long had they been in residence when Enerjak, aided anonymously by Mammoth Mogul, returned to seek his revenge. Seemingly betrayed by Julie-Su, Vector and the others were taken prisoner by the Dark Legion, who had sided with their ancestral hero. Escaping, they returned to Echidnaopolis just in time to save Dimitri from a sudden end after Mammoth Mogul used the Sword of Acorns to drain his powers. Vector joined in the fight against the newly empowered Master Mogul, but the day was only saved when Knuckles, Sonic, and Miles "Tails" Prower received a power boost from the Chaos Emeralds and Power Rings to transform into improved forms that Mogul was defeated and sealed in the new Master Emerald. While Knuckles then departed to aid the Lost Tribe of Echidnas, Vector and the Chaotix joined forces with Echidna Security Team Constable Remington to investigate their old enemy Renfield T. Rodent, who had refurbished his old theme park and begun tainting the food with an experimental seasoning designed to cause addiction and thus bring patrons back for more. Renfield accidentally put too much of the ingredient into some of his food, and the resulting overdose killed Charmy's friend Mello. The Chaotix themselves-Vector included-were left disoriented by a similar poisoning, but recovered quickly enough. They then brought Renfield and his employer, Ebony Hare, to justice after defeating them and saving Julie-Su from their henchmen.

Following Knuckles' return, Vector and the rest of the Chaotix would find themselves with no enemies to fight for a time, other than Vector's antagonism towards Julie-Su. That ended when the Dark Legion resurfaced yet again, this time attempting to seize control of Angel Island through politics. Vector and the other Chaotix defeated them, only for Knuckles to be spirited away briefly by his ancestors in the Brotherhood of Guardians to Haven. When he returned, the Guardian would struggle to come to grips with his feelings for Julie-Su, which Vector was rather unhelpful with due to his opposition of the whole thing. Still, Vector was eventually pacified, and was there with his first known date at Knuckles' birthday party when his old friend and his increasingly friendly rival kissed for the first time. Together with the other Chaotix, Vector would then help his friend when Knuckles' found himself switching bodies with Sonic due to a teamup between the Dark Legion and Robotnik. Shortly after, the Chaotix found themselves in the Mysterious Cat Country with Knuckles gone to aid the Freedom Fighters and the local inhabitants eager to punish them, and it was only Locke's timely intervention that saved them. Soon Vector was up against the Dark Legion again, but this time he and the Chaotix-except for Julie-were all transported to the Twilight Zone by the Quantum Beam.

Vector was soon brought back to Mobius, together with the other natives of Angel Island, by Chaos Knuckles. Having little to do with the attempted reunification of the Echidnas, he played an equally little role in Chaos Knuckles' battle with Mammoth Mogul, which resulted in Knuckles' death. Like the other Chaotix, he was present at Knuckles' funeral, and for once the usually hard-bitten Crocodile was overcome. Soon afterwards, he and the other Chaotix found themselves telling a grieving Julie-Su stories of their early days with Knuckles, and the long conflict between the hothead Crocodile and the female Echidna reached an all time low point. Vector was quick to join the assembled forces against the alien Xorda, and there was witness to Knuckles' miraculous return.

With Knuckles back-albeit weakened, and Angel Island lost to Dr. Eggman and the Dingoes, Vector and the Chaotix relocated to Knothole and joined the Freedom Fighters in the ongoing war against the mad doctor. They were among the first to learn of Sonic's return after the Hedgehog reappeared, having been thought dead for a year after stopping the Xorda Quantum Dial. When Robotnik launched a major offensive to commemorate the occasion, Vector joined Knuckles, Julie, Amy Rose, and the other Chaotix in protecting the irradiated and dangerous ruins of the city of Robotropolis from being penetrated and the nuclear fallout contained within from being unleashed.

Soon after, Charmy, who had left the group over a year before to return to the Golden Hive Colony and his role as prince, arrived in Knothole with his girlfriend Saffron and news that the colony had been destroyed by Eggman, infuriating Vector and his other friends. News from Angel Island that Locke had been captured gave the Chaotix the perfect opportunity to take action, launching a rescue mission with Sonic to back them up. However, they met with the unexpected surprise of finding Knuckles worshiped almost religiously by most of the Echidnas, who held him to be the Avatar of legend who was destined to bring peace to Mobius. Vector fought alongside Knuckles as his old friend struggled with this, as well as against the Dingoes, and then returned to Knothole with him once their job was done, the Guardian's powers were restored, and Knuckles decided that Eggman was the greater threat to all of Mobius.

Vector next saw action when the Metal Sonic Troopers, robots built by the Kingdom of Acorn to replace Sonic after his apparent death, were hijacked by Robotnik's "son" A.D.A.M. and directed against both Robotnik and Knothole anonymously. The Crocodile joined his friends in battling against the robots, though in the end victory went to Shadow the Hedgehog.

All of the Chaotix would then face Mammoth Mogul and the Fearsome Foursome-now joined by two new members and called the Destructix, again, together with the evil wizard Ixis Naugus and his Arachne minions as the two sorcerors briefly battled it out over the Sword and Crown of Acorns. The two eventually joined forces, and Vector and the others found themselves unable to triumph even when aided by the Freedom Fighters, Merlin Prower, and the valiant Sir Connery, leaving it to Dr. Eggman to capture the small army of villains.

When Rouge the Bat arrived in Knothole, having last been seen fleeing the Freedom Fighters and Shadow with Scourge the Hedgehog, Vector was the hardest on her and the most suspicious of her motives besides Julie-Su. Despite this, they allowed her to accompany them on a mission to investigate their old enemy Renfield T. Rodent, whose newest casino was a front for Eggman's newest plan to create Auto Automaton robots to infiltrate the strongholds of his enemies by hypnotizing casino patrons and copying their data. Vector fell victim to this trap, but suffered no permanent harm.

For a short time afterwards, he and the other Chaotix performed guard duty for singer Mina Mongoose, and were forced to let the Freedom Fighters look into rumors that Rouge had stolen the Master Emerald, which turned out to be an intricate sting operation.

When Knothole was destroyed by Eggman's Egg Fleet, Vector was among the many sent to the Egg Grape Chambers to have his life force extracted for Eggman's purposes. Fortunately, Knuckles and a handful of other escapees rescued their friends in time, and thanks to Sally's computer NICOLE they were all transported to the city of New Mobotropolis. Eggman quickly launched another offensive to recapture them, but his Egg Beater armor proved unable to stand against the combined forces of the Chaotix and Freedom Fighters, Vector included.

With a momentary lapse in the fighting, Vector remained in the city while Knuckles departed for Angel Island. After learning of the coming of a new Enerjak, with Knuckles still unaccounted for, Vector supported Julie-Su and led the Chaotix in an attack on New Mobotropolis' air field with the intent of capturing a plane they could use to return to Angel Island. They were soon stopped by Sonic and then Sally, who convinced them to remain in the city to guard against Enerjak. When the new incarnation of their old foe was revealed to be Knuckles, the Chaotix were of little help, even as Sonic and Shadow fought against him. Vector found himself helpless as Enerjak was first captured by the Egg Fleet and then fought Super Sonic in an epic showdown, which ended with Enerjak being returned to normal. Knuckles, feeling guilty over his actions, hid on Angel Island, and Vector was quick to return to try and keep an eye on him. Working together with the other Chaotix, he built a bridge between the Angel Island mainland and the new miniature island that held the Master Emerald Shrine, finishing just in time to welcome Knuckles back into the group.

Following the Enerjak crisis, Vector and the rest of the Chaotix launched an assault on New Mobotropolis to take out the Dark Egg Legion and destroy one of Dr. Eggman's communications relays.