Bio: Our hero makes his fourth debue. Still loving speed, and still carefree as ever, Sonic is making his way through, saving the day, helping his friends, and stopping Eggman or whatever is threatening peace.

Bio: Tails also is back, this time prefering his variety of fast flying machines over his own Tails. A bit more mature, Tails is often the more serious one, making sure the job gets done, even if it means spending many hours with wrench in hand.

Bio: Cosmo is from a plant-like species from a far off planet GreenGate. She flees from the evil meterex. Cosmo is a very shy girl, who hates violance. She also has seemed to take a liking to Tails and his bravery yet tendernous.

Bio: Stubbern as always, Knuckles wants nothing but to spend his time gaurding the master emerald. He is rarely in a good mood, and always critical of Sonic's carefreeness. Knuckles is strong, and never a force to recon with. Inside he likes to beleive that there is good in everyone, which is why he always falls for Eggman's tricks.

Bio: Tikal is a girl back in ancient time who first encountered Chaos, and befriended the beast as well as the Chao it protected. It was she who gaurded him throughout time.

Bio: Amy Rose is both a new and not new character. Being the subject of saving in many of Sonic's earlier adventures, she is always after Sonic to be her boyfriend, even if Sonic seems to be un-taimable. She can be sweet, but in a moment can be really really mad, and you won't like her when she's angry.

Bio: Cream and her Chao, Cheese, are best friends, always together. Cream herself is a very young and polite little girl, who is always remembering her manners and is the "cutie" of the series. Later on, she becomes a little tougher as she is able to help fight as well with her flying ears.

Bio: This is Cream's mother, who is also very kind and polite. She trusts her daughter and missed her very much when they were seperated.

Bio: Big the cat is a, well, big cat. He and his friend Froggy get into trouble when Chaos emerges. Bigs is slow, loves fishing, and is pretty strong.

Bio: Chris is the kid that saved Sonic from the pool. Chris joins Sonic and his friends in all their adventures, learning bravery and adventure, and gaining friends along the way.

Bio: Chuck is Chris' grandfather, and loves adventure as much as the rest. He works best with Tails, since they both are engineers, and helps keep everyone together.

Bio: Nelson is Chris' father. He is the owner of the world's biggest software company for space travel, as well as running some other places. He is often away, and panics when Chris is in any danger what so ever.

Bio: This is Chris' mother, a famous movie star, who's looks are as good as her cooking is bad. She too is always gone, which breaks her heart, but Chris loves his parents and understands.

Bio: Sam is Chris' Uncle. This guy is captain of the S-Team. He loves going fast as much as Sonic, and finds that the blue hedgehog is the only challange he has ever really gotten.

Bio: Mr. Tinaka is the Throndike family butler. He is a cool man, who gets overly enthusiastic over karate and other japanese traditional stuff.

Bio: Ella is the Thorndike family cook and made. She is very happy, and loves to cook. She also loves taking care of Cream and Cheese, and can have a bit of a temper when pushed.

Bio: Mr. Stuart is Chris' new teacher, although he is actually working for the president to keep an eye on Chris and his friends.

Bio: Danny is Chris' friend, along with Francis and Helen. They idolize Sonic and love the adventure they get into from knowing Chris.

Bio: Also Chris' friend, she is often a high spirited girl who loves having fun.

Bio: Helen is a very kind girl, and loves adventure even though she can't move her legs. Later she works with Chris in his engineering.

Bio: Rouge is the femanine touch to the group, also on her own and always looking for gems and treasures. She is enlisted by the president to help with Eggman, and much later she tags along with Eggman on his space ship.

Bio: Topaz is the agent assigned to work with Rouge. At first she finds Rouge vulgar and annoying, but as they work together they soon become friends.

Bio: He's the president of the country, and often finding himself helpless to stop Eggman. He is more often concerned with his poll ratings as his efforts pail in respect to Sonic's and his friends.

Bio: Famous newscaster who is always covering all the latest events and breaking news with Eggman and everything going on.

Bio: Vector is the head of the Chaotix detective agency. He acts tough, but really he's a softy, and often jumps to conclusions due to his "intuition."

Bio: Charmy is the mascot of the Chaotix detective agency. He is just a kid, and often annoys the others, but he also livens up the place.

Bio: Espio is the sleek one of the Chaotix agency. He's a chameleon, and with it he's fast, he can go camoaflage, and he's a ninja.

Bio: Formally known as Robotnik, Eggman is a little less and more diabolical than before. More concerned with the chase than the results, Eggman is often creating different plots to take over the world, but when it comes to the destruction of it, often joins with Sonic to save it. You need a world to be able to take it over, and you need an arche enemy to make taking it over fun.

Bio: Bokkun is one of Eggman's servants, always running around delivering his messages, and being the brunt of their criticism.

Bio: Decoe is the second servant of Eggman, who (along with Bocoe) help Eggman with his ship, manage repairs, and sometimes operate some of Eggman's ships. He is also pretty critical of Eggman, as with his partner Bocoe.

Bio: Bocoe is the third servant, who works along side of Decoe. Pretty much the same as Decoe in job description, and with the same criticism of Eggman.

Bio: Chaos is a mysterious creature that used to protect the Chao, but after a series of events went to seek revenge. This creature can absorbe the power of the chaos emeralds and grow bigger and stronger.

Bio: The ultimate life form, created by Eggman's grandfather Gerald Robotnik, Shadow is like Sonic, but stronger. He can use the chaos emerald's power to warp from place to place, and can also transform into a more powerful form. His past is often a mystery to him, as he finds it hard to understand who he really is and what's his purpose.

Bio: Dark Oak is the leader of the feared Meterex. This machine like leader is a mystery, and boast power that even Sonic in super form cannot defeat.

Bio: Yellow Zelkova is the strong, but block headed general of the meterex. He is often thinking force rather than cunning, and charges in to fight our heroes.

Bio: Another general of the meterex, Black Narcissis often favors less force and more cunning. This leader uses traps, and deceaves out heroes. His weakness? He wants to toy with his pray to much.

Bio: The last general, this one is more a mixture of both strenght and smarts. He leads the meterex's fleet into battle in response to an attack from Sonic and the rest.