What if Sega never left the video game console market?/Sonic the Hedgehog

Sonic the Hedgehog is a Japanese adventure-science-fiction platformer video game series created by, and , being developed by Sonic Team and published by Sega since June 23rd, 1991.

Synopsis
The series follows Sonic traveling around Mobius, defending from evil, primarily from the dangerous Doctor Eggman.

Adventure
Eggman ends up freeing an entity known as Chaos as Sonic and his friends race to stop Chaos while learning of his connection to Knuckles' tribe.

Adventure 2
Eggman returns now with the help of a mysterious black hedgehog and a bat thief as they plot to activate a canon hidden in the stars as Sonic and his friends race to stop them.

Heroes
Sonic and his friends, alongside a few other figures, get invites by Eggman for a mysterious reason as all of them race to figure out what Eggman is planning before it is too late.

Armageddon
Two mysterious entities, a dark god known as Mephiles and a raging fiery demon known as Iblis are on a path of destruction as Sonic heads to stop them, soon having to deal with a traveler from the future and the fate of a sovereign nation.

Unleashed
While venturing, Sonic gets attached to strange dark energy and transforms into a werewolf-like beast as he has to join an amnesiac chipmunk on a quest to stop Eggman from creating "Eggmanland".

Games

 * 1) Sonic Adventure (1999)
 * 2) Sonic Adventure 2 (2001)
 * 3) Sonic Heroes (2003)
 * 4) /Sonic Armageddon/ (2006)
 * 5) Sonic Unleashed (2008)
 * 6) Sonic Colors (2010)
 * 7) Sonic Generations (2011)
 * 8) /Sonic: Rise of the Zeti/ (2013)
 * 9) /Sonic Forces/ (2017)
 * 10) Sonic Frontiers (2022)

Handheld

 * 1) Sonic Advance (2001)
 * 2) Sonic Advance 2 (2002)
 * 3) Sonic Battle (2003)
 * 4) Sonic Pinball Party (2003)
 * 5) Sonic Advance 3 (2004)
 * 6) Sonic Rush (2005)
 * 7) /Sonic Rivals/ (2006)
 * 8) Sonic Rush Adventure (2007)
 * 9) /Sonic Rivals 2/ (2007)
 * 10) Sonic Chronicles: The Dark Brotherhood (2008)

Spin-offs

 * 1) Sonic Shuffle (2000)
 * 2) /Shadow the Hedgehog/ (2005)
 * 3) [the Tails spin-off] (2007)
 * 4) [Black Knight replacement] (2009)
 * 5) Sonic the Hedgehog 4 (2010)
 * 6) /Sonic Brawl/ (2012)
 * 7) Sonic Mania (2017)
 * 8) Team Sonic Racing (2019)

Sonic Riders

 * 1) Sonic Riders (2006)
 * 2) Sonic Riders: Zero Gravity (2008)
 * 3) /Sonic Free Riders/ (2010)
 * 4) Sonic Riders: TBD (2013)

Sonic Boom

 * 1) Sonic Boom: TBD (2014)

Pre-Adventure

 * Sonic the Hedgehog (voiced by Roger Craig Smith since 2010) - a cocky yet fun-loving hedgehog who loves the thrill of adventure as he often thwarts the schemes of Eggman.
 * Miles "Tails" Prower (voiced by Kate Higgins from 2010 until 2014 and Colleen O'Shaughnessey afterwards) - an intelligent and occasionally anxious fox who is a skilled inventor as he is Sonic's best friend, loving to work with his buddy.
 * Knuckles the Echidna (voiced by Travis Willingham since 2010) - a stoic yet somewhat naïve echidna who makes it his goal to protect the Master Emerald as he is somewhat friends with Sonic.
 * Amy Rose (voiced by Cindy Robinson since 2010) - a giddy and energetic hedgehog who is both a practicing fortune teller and has a crush on Sonic, often joining him on his adventures.

Introduced in Adventure 2

 * Shadow the Hedgehog (voiced by Kirk Thornton since 2010) - an experiment created by Dr. Gerald Robotnik to be the Ultimate Lifeform as he was contained after being declared too dangerous as he soon breaks free and grows a rivalry with Sonic.

Introduced in Rush

 * Blaze the Cat (voiced by Laura Bailey from 2010 until 2019 and Erica Lindbeck afterwards) - TBD

Introduced in Armageddon

 * Silver the Hedgehog (voiced by Quinton Flynn from 2010 until 2019 and Bryce Papenbrook afterwards) - TBD

Introduced in Boom

 * Sticks the Badger (voiced by Nika Futterman) - a paranoid badger who believes in multiple conspiracy theories as she becomes a quick friend to Sonic.

Introduced in Forces

 * Whisper the Wolf (voiced by Cristina Vee) - a shy noble mercenary who used to be Infinite's partner before betraying him after learning they were working for Eggman as she joins the Resistance with her Wispon, mainly to redeem herself for her past mistakes.

Pre-Adventure

 * The Chaotix, consisting of:
 * Vector the Crocodile (voiced by Keith Silverstein since 2010) - TBD
 * Espio the Chameleon (voiced by Troy Baker from 2010 until 2014 and Matthew Mercer afterwards) - TBD
 * Charmy Bee (voiced by Colleen O'Shaughnessey since 2010) - TBD

Introduced in Adventure

 * Big the Cat (voiced by Kyle Hebert since 2010) - TBD
 * Froggy - TBD

Introduced in Adventure 2

 * Rouge the Bat (voiced by Karen Strassman since 2010) - a seductive bat who is a professional jewel thief as she has both a rivalry against Knuckles and a friendship with Shadow.

Introduced in Advance 2

 * Cream the Rabbit (voiced by Michelle Ruff since 2010) - TBD
 * Cheese the Chao - TBD
 * Vanilla the Rabbit (also voiced by Michelle Ruff since 2010) - TBD

Introduced in Heroes

 * E-123 Omega (voiced by Vic Mignogna from 2010 until 2019 and Aaron LaPlante afterwards) - TBD

Introduced in Armageddon

 * Princess Elise III (voiced by Lacey Chabert) - TBD

Introduced in Rush Adventure

 * Marine the Raccoon (also voiced by Colleen O'Shaughnessey since 2010) - TBD

Introduced in Unleashed

 * Light Gaia/Chip - TBD
 * Professor Dillon Pickle (voiced by Patrick Seitz since 2010) - TBD

Introduced in Chronicles: The Dark Brotherhood

 * Shade the Echidna (also voiced by Michelle Ruff since 2010) - TBD

Introduced in Generations

 * Sonic the Hedgehog (Classic) (voiced by Jaleel White) - TBD

Pre-Adventure

 * Dr. Ivo "Eggman" Robotnik (voiced by Mike Pollock since 2003) - a hammy yet dangerous mad scientist who wants to take over all of Mobius, often clashing against Sonic.
 * Metal Sonic - a dangerous and psychopathic android created to be a dark doppelgänger of Sonic as he grows obsessed with beating him.

Introduced in Adventure

 * Chaos (non-speaking) - an ancient entity who grew mad after his tomb was invaded by the Echidna Clan as he gets resurrected by Eggman and begins a rampage across Mobius.

Introduced in Riders

 * The Babylon Rogues, consisting of:
 * Jet the Hawk (voiced by Michael Yurchak since 2010) - TBD
 * Wave the Swallow (voiced by Kate Higgins since 2010) - TBD
 * Storm the Albatross (also voiced by Travis Willingham since 2010) - TBD

Introduced in Armageddon

 * Mephiles the Dark - TBD

Introduced in Forces

 * Infinite the Jackal (voiced by Liam O'Brien) - a terrifying yet cocky mercenary who fused with an ancient device known as the Phantom Ruby as he forms an alliance with Eggman, being obsessed with power and with destroying who he blames for his power, Whisper.

Introduced in Frontiers

 * Sage (voiced by Ryan Bartley) - TBD
 * The End (also voiced by Mike Pollock and Cindy Robinson) - TBD