Sonic Boom announced, but just what has Sega done to Knuckles

Sonic Boom to encompass video games on Wii U and 3DS, a TV series, and a toy line; launching in 2014.
Sonic Boom: Shattered Crystal is a standalone adventure that shares key characters, events and lore of the Sonic Boom universe with exclusive environments and characters, as well as an emphasis on platforming and puzzles.

Paramount and Sega Announce Sonic 3, Knuckles Live-Action Spinoff

The Switch Version Of SONIC THE HEDGEHOG 2 Is Getting Knuckles! — GameTyrant

SEGA Announces New Sonic Boom: Fire and Ice Video Game for Nintendo 3DS

How Sega killed Sonic the Hedgehog and made a surprisingly sincere game - Los Angeles Times

Sonic Boom BF Scenarios - When you meet: Knuckles - Wattpad

The pandemic gets extended as yet another Sonic the Hedgehog sequel and a Knuckles TV series are announced – SideQuesting

The Entire Sonic The Hedgehog Timeline Explained

For Some Reason, Sonic Is Now Starring In A Live-Action and Animation Movie Hybrid

Review: Sonic sequel features fan-favorites – The Ithacan

Knuckles the Echidna – Wizard Dojo

Go on an Exciting, High-speed Adventure with Your Friends! Sonic Superstars Released Today!｜SEGA CORPORATION

Sonic Prime': Same Sega Flair with Some Redemptive Introspection

If Sega had decided to make an new Sonic fighting game this would be the roster. So I made a concept collage of what a Sonic Fighting Game roster would look like

Knuckles Spin-Off Series Announced With Idris Elba In Lead Role - IGN

Sonic Boom gives Sega's series a new look, two new developers - Polygon