Gemerl

Sonic The Hedgehog #273 (First appearance), 274-275

Mega Man #50-51 (Crossover)

Sonic Boom #9

Last updated: August 20, 2015

Dark Gaia Titan

Sonic Universe #'s 65 (First appearance), 66

Sonic The Hedgehog #272

Last updated: June 10, 2015

Apotos Ice Cream Man

Sonic The Hedgehog #272 (First appearance)

Last updated: June 10, 2015

Professor Von Schlemmer

Sonic Universe #'s 79-82

Free Comic Book Day 2015 (First appearance)

Last updated: March 11, 2016

The Ifrit

Free Comic Book Day 2015 (First appearance)

Last updated: June 10, 2015

Burn Bot

Sonic Boom #'s 1 (Cover only), 5 (First appearance)

Last updated: March 15, 2015

Obliterator Bot

Sonic Boom #'s 5 (First appearance)

Last updated: March 15, 2015

Comedy Chimp

Sonic Boom #'s 5 (First appearance), 6, 7 (Cover only), 8-11

Sonic The Hedgehog #273-274 (Off-Panels), 275

Sonic Universe #77-78

Mega Man #50-52 (Crossover)

Last updated: March 11, 2016

Dave the Intern

Sonic Boom #'s 5 (First appearance), 7 (Off-Panel)

Sonic Universe #77 (Off-Panel)

Last updated: June 29, 2015

The Mayor

Sonic Boom #'s 5 (First appearance)

Sonic Universe #77 (Off-Panel)

Last updated: June 29, 2015

Fastidious Beaver

Sonic Boom #'s 5 (First appearance), 6-10

Mega Man #'s 50-52 (Crossover)

Sonic Universe #'s 77-78

Sonic The Hedgehog #275 

Last updated: August 20, 2015

Admiral Beaverton

Sonic Boom #'s 5 (First appearance)

Last updated: March 15, 2015

Lady Walrus

Sonic Boom #'s 5 (First appearance)

Last updated: March 15, 2015

Neo Metal Sonic

Sonic The Hedgehog #270 (First appearance/Flashback)

Last updated: March 15, 2015

Wes Weasley

Sonic The Hedgehog # 269 (First appearance), 270

Last updated: March 15, 2015

Silver Sonic (Prototype)

Sonic The Hedgehog #269 (First appearance/Flashback)

Last updated: February 12, 2015

Gregorios

Sonic The Hedgehog #'s 268 (First appearance), 271-272

Last updated: May 28, 2015

Honey The Cat

Sonic The Hedgehog #'s 268 (First appearance), 269-271

Last updated: April 17, 2015