Scratch and Grounder

Sonic The Hedgehog #'s 2 (First appearance), 4, 11, 16, 57 (Flashback), 187-188, 259 (Off-Panel), 268-269, 270 (Variant cover), 271, 275 (Variant Cover)

Sonic Universe #15 (Grounder Cameo)

Sonic Super Special #15 (Grounder only)

Sonic: Worlds Unite Battles #1 (Grounder Cameo)

Last updated: August 20, 2015

Queen Angelica

Sonic The Hedgehog #261 (First appearance), 263, 270 (Cameo)

Last updated: March 15, 2015

King Puff

Sonic The Hedgehog #'s 261 (First appearance), 263, 270 (Cameo)

Last updated: March 15, 2015

Striker The Mantis Shrimp

Sonic The Hedgehog #'s 260 (First appearance), 261-263, 270 (Cameo)

Last updated: March 15, 2015

Pearly The Manta Ray

Sonic The Hedgehog #'s 260 (First appearance), 261-263, 270 (Cameo)

Last updated: March 15, 2015

Razor The Shark

Sonic The Hedgehog #'s 260 (First appearance), 261-263, 270

Last updated: March 15, 2015

Coral The Betta

Sonic The Hedgehog #'s 259 (Variant Ending/First Appearance), 260-263

Last updated: August 11, 2014

Chip

Sonic Universe #64 (First appearance), 65-66, 67 (Flashback), 70 (Off-Panel), 75 (Variant cover)

Sonic The Hedgehog #265 (Convention Variant Cover), 267 (Variant Cover), 268-269, 270 (Variant cover), 271-272, 276-279

Last updated: March 11, 2016

Dark Gaia Monsters

Sonic The Hedgehog #'s 260-263, 272, 275 (Variant cover), 278-279

Sonic Universe #'s 63 (First appearance), 64-66, 71, 73-74

Last updated: March 11, 2016

Fixit

Sonic Universe #63 (First appearance), 64-70, 75 (Variant cover)

Last updated: May 28, 2015

Relic The Pika

Sonic Universe #63 (First appearance), 64-70, 75 (Variant cover)

Last updated: May 28, 2015

Dillon Q. Cumber

(Picture stolen from Sonic News Network. Will replace once this guy makes an actual appearance in the comic.)

Sonic The Hedgehog #258 (Off-Panel)

Last updated: June 17, 2014

E-100 Series Robots

Note: This list excludes E-102 Gamma and E-123 Omega.

Sonic The Hedgehog #'s 79 (First appearance), 81-82, 258-259, 265-267

Last updated: December 20, 2014

Professor Pickle

Sonic The Hedgehog #'s 257 (Cameo/First appearance), 258-259

Last updated: June 17, 2014

Amanda Tower

Sonic The Hedgehog #257 (First appearance)

Mega Man #50 (Crossover/Cameo)

Last updated: June 17, 2015

Black Arms

Sonic The Hedgehog #'s 170 (First Appearance)

Sonic Universe #'s 59-62

Last updated: June 17, 2014